Whipple Supercharged Gen3-426 Stroker-1967 Barracuda Swap

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1meanfish

1meanfish

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Hello Everyone,

I have a 1967 Barracuda that I've owned since I was 17 (I'm 58 now). It currently has an 850hp, F1 Procharged small block (R3). It's back halved with a 10 point roll cage. It's a street car with Gearvendors OD, PS, PB and AC.

I originally built this Gen3 Hemi for a 1948 Plymouth coupe. But as I look at it on the engine stand, ready to roll, I got to thinking that I didn't want to wait another year or two to get the coupe ready to handle that kind of power. So I got the great idea as I looked over at my Barracuda and said "F" it.... I think that Hemi would be awesome in my Barracuda and it's already set up to handle the extra ponies that this Hemi will pump out.

Am I nuts? The current set up runs great, but the old hot rodder in me just can't leave well enough alone...lol.

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Go for it! The main reason I ended up with a modern 5.7 Hemi in my car was because it made more sense to start with a modern design with all the efficiency gained from that than to try to build up older tech to the same point. A "basic" modern engine today will put out 400 hp, idle like nothing special, run for 100k+ miles, and not leak a drop of oil along the way. Plus they take well to modification. The stock heads on my 5.7 outflowed race heads from the 60s and only have more room to go from there.

Not to say that old stuff isn't still cool in its own regard. What you have obviously works, so on the one hand why mess with a good combo, but on the other, why not make it better?
 
A G3 isn't a bolt in deal in some ways. Trouble spots I can think of is the firewall and inner fenders.

I don't know if that SC has a manifold on the back of it like the Hellcat one, but if it does and you try and put it in the stock location (front to back) you might need to notch the firewall to clear it. Based on what I can see, shouldn't be an issue as it looks like the intercooler lines plumb into the front left corner. But the SC might still crash with the wiper motor mount and the wiper motor itself either way.

Those valve covers might require the top of the inner fender at the shock on the passenger side to be modified as well. My brother is doing a 6.4 into a '71 Demon swap and used the Holley fabricated VC's and couldn't get them to work without a mod there.

Power steering will be an issue if you don't have a Borgeson box, the stock PS box is a no-go with all the swap headers I am aware of.

Not sure your oil pan works with the TTI swap headers either. Just a guess, something else to look into.

The AC compressor you are running won't work with anything except the Holley system and those require the '73+ spool mount v8 k-frame that move the motor forward 1.75". You can swap to the Holley FEAD kit but I think it is $3K or more.

You will also need to notch your PS frame rail flange with the alternator you are showing. All it takes (generally) is to remove the flange and re-weld it, but if your engine compartment is painted, it might not be something you want to do.

Does the car have EFI already? If it isn't already then plan on a fuel system.

Not saying it wouldn't be worth doing, just don't want you think it is as simple as pulling one motor and bolting the other in.
 
Thanks for the info and input. I know going in that it isn't going to be a “bolt and run” project. But it will still require a LOT less fabrication work than my Plymouth Coupe to get it up and running.

I’m already running the RMS AlterKation front suspension which should be a plus. I already called Bill at RMS and ordered the new Hemi motor mount that’ll need to be welded in.

I’m already aware of the clearance work needed for alternator. That shouldn't be too big of a deal.

The Whipple does not have the manifold sticking off the back so I don’t think it’ll interfere with the wiper motor or firewall. It might need a little massaging. I’m more curious about where the AC lines and heater core lines.

I do not think the oil pan I have on there now will work with the TTI headers. I’m hoping I can figure out how to use it, but if not, no big deal to change the pan.

I am curious where the issue might come in with the AC compressor? I have seen 6.4 Hemi installs with the factory compressor and it seems to fit?

Thanks again everyone.

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1meanfish said:
Thanks for the info and input. I know going in that it isn't going to be a “bolt and run” project. But it will still require a LOT less fabrication work than my Plymouth Coupe to get it up and running.

I’m already running the RMS AlterKation front suspension which should be a plus. I already called Bill at RMS and ordered the new Hemi motor mount that’ll need to be welded in.

I’m already aware of the clearance work needed for alternator. That shouldn't be too big of a deal.

The Whipple does not have the manifold sticking off the back so I don’t think it’ll interfere with the wiper motor or firewall. It might need a little massaging. I’m more curious about where the AC lines and heater core lines.

I do not think the oil pan I have on there now will work with the TTI headers. I’m hoping I can figure out how to use it, but if not, no big deal to change the pan.

I am curious where the issue might come in with the AC compressor? I have seen 6.4 Hemi installs with the factory compressor and it seems to fit?

Thanks again everyone.

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Nice! Sounds like you are already aware of the potential issues.

I was assuming a factory k-frame rather than a COC, so some of my thoughts don't apply.

The AC compressor issue is just with the factory k-frame as the factory compressor hits the DS mount when using the TTI or Schumacher mounts and even worse the TTI mounts use the AC compressor bosses on the block. I would bet that the ones you have seen didn't have a factory k-frame. There is one guy on here (@Dantra) that made it work but he moved his motor forward 5/8" and used a different AC compressor so it is possible. But with the suspension you have it shouldn't be an issue.

And I'm not saying the TTI headers won't fit with that pan, only that it might be an issue. Just making you aware so you go into it with eyes open. My brother had a heck of a time with oil pans, but I don't remember if it was that style or some other issue. Sounds like you have the right mindset to get past it if it is an issue.

I would speculate you will see a fair increase in drivability and lose zero speed with this swap. Curious to hear how you feel about it when you are all done, betting you will love it. I could see you building another one for your Plymouth and selling the SB. :)

Post some pictures of the '48 too, my favorite fat fendered street rod. I had a '47 Business Coupe I tried to build years ago and sold/traded for various reasons.
 
Shew, you had me nervous there for a bit about the AC…lol. And I would like to use this oil pan. Hopeful I can get it to work with the TTI headers without too much massaging.

That’s funny, I also had a 47 Plymouth coupe when I was a kid. Actually even before I got the Barracuda. I was like 15. I was building a 354 Hemi with dual quads but didn’t have the money, tools or skill back then.

Which is why I bought the 1948 Coupe. To finish that project I never did when I was a kid. Except this time with a modern twist, a Gen 3 Hemi. It’s been on my bucket list!

Here is the one I had when I was a kid. That’s me as a scrawny long haired teenager working on it.

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And here’s the 1948 that I’ll be building. Don’t laugh at the paint. It was like that when I got it. Someone did a full frame off resto back in 1998. Supposedly it was for the guys 50th LSU reunion, hence to purple and yellow and why he did a 1948.

But the car is very solid. Has perfect original chrome, dash. It’s like driving in a time capsule. Every nut and bolt and washer is almost like new. I almost hate to cut it up. But the 95HP flathead six bores me.

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That car would be a shame to cut up....but flat-heads are pretty slow.
 
DionR said:
I would speculate you will see a fair increase in drivability and lose zero speed with this swap. Curious to hear how you feel about it when you are all done, betting you will love it. I could see you building another one for your Plymouth and selling the SB. :)
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The Procharged Small block is already on the market and I haven’t even pulled it out the Barracuda yet so you are correct…lol.

But for the coupe I’ve decided not to go the monster 1100hp+ Whipple supercharged route. I’m just going to get a 6.4 and warm it up a little with a cam, forged pistons and a little hand porting/clean up on the heads, etc. Make it more of a cruiser.

Oh, and I plan on going with the 6 speed manual too. I think that I want to keep it a manual. It’s three on the tree currently.
 
sireland67 said:
That car would be a shame to cut up....but flat-heads are pretty slow.
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Yeah, it’s like driving a car just like it came off the showroom floor back in 1948. It’s cool being completely all original. But not much fun, for me anyway.

And it’s not like these cars are highly collectable, high dollar museum car like some rare one off Hemi Cuda or something.
 
Let’s see the R3 pro charged engine currently in the car. How much power does the Whippled hemi make?
 
TT5.9mag said:
Let’s see the R3 pro charged engine currently in the car. How much power does the Whippled hemi make?
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The Hemi should be about 1100hp pretty easily. I could turn it up to 1400+ on E85.

I built it like a tank. It’s a BGE block and heads, with a Manley Stoker forged Kit including the H-Tuff Rods, extreme duty pistons (9.5 to 1) an CamMotion custom ground cam and Arrington Billet main caps just for good measure. It should be able to handle anything I can throw at it.
 
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