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This is what would get you for 3-4 K with no safety regulations in this day and age. This one is 230cc and only cost $3,999 LOL

Here is a good example of technology. F1 one lap in Monte Carlo in 1986 compared to 2011. This is after F1 continues to try to slow these cars down with a naturally aspirated 2.4 V8 limited to 18,000 rpm and limiting the amount of wing that they can run. Like night and day. F1 1986 vs F1 2011...

Wow thanks Justin. Flowing 260s sounds good to me, but I'm an idiot when it comes to to head flow and cam shafts. I plan on running quite a bit more gear than I originally posted, well at least have a couple of different chunks to swap out at the track if need be. I plan on running a Holley 750...

Yes they were originally 1.88

Yikes Justin. Those are pretty sad numbers. Why does it fall off after .400"? I am anxious to see what you can do.

Wow thanks Moper, actually the 270S calls for the same valve springs that I have already on the heads. They have been machined for these springs already. It may be an option.

Thanks Justin and Rick. I value your opinions a great deal. Not much of an engine guy here, but eager to learn. Rick for the time being I plan on running street tires and I'm sure the chassis can handle it, but when I go to sticky slicks then I will be installing a cage and tying everything...

I will give Howards and Comp tomorrow.

Thanks Rick. I have raced autocross and rallycross in the past, but they were in imports :wack: ,but still a ton of fun. Much like drag racing, you finish a run and get out the car shaking. I miss that feeling.

Thanks rick. So would you just run the cam strait up 106 degrees? The manual valve body was going to be my next question and I was going to get with Tony aka 70aarcuda. He has done a few. Thanks again, John

Since it's already installed and degreed I may just run it and see. I think that will have a couple different gear sets just in case.

Thanks bomber. I will look at them also. Thanks 273. I already have the last cam installed, but never ran. It's the XE284H. I guess I have some thinking to do.

Hey Brent. Did your brother get that R/T? I'm running TTI's btw.

If that's the case I may just run what I have. What do you think? I know it will be a pig off the line.

Oh and please don't say build a 408 or 390 :angry4: This will give you and idea of what it is all about. Fox Mustang Autocross SCCA C Prepared CP - YouTube

First of all this is not for drag racing!!!!! This car will be setup for SCCA Solo racing so I need a flat low rpm torque curve. This is for a 3,000lb early A body (class I will be running in). For the time being I will be running a fresh 904 with a TF2 shift kit. Why an automatic? 90% of...

Well I just received a message from a long time racer in SCCA CP and he informed me that it is not worth it using a 273 even if stroked. He claims even with the 300lb weight break it isn't worth it. The torque of a 318,340 or 360 stock stroke or stroker torque more than makes up for the weight...

I'm not holding my breath. I think it for racing in SVRA (SportsCar Vintage Racing Association) and not SCCA. SVRA is really strict about anything that you run. Must be period correct stuff.

Hey Louis

News Flash!!!!! I have been over at the Grassrootsmotorsports.com with my build thread and found some info. Most of these guys are tied into the SCCA and here is a quote that I am researching. "I know CPDave here petitioned the SCCA to allow 318's to be substituted for 273's, but I can't...

Thanks Rumble.

Those poly motors are big and heavy. Thanks for the input though. :wink:

273 have you looked at any solid rollers for this combo? If I keep it factory bore and stroke run more gear then I want it to be able to scream. :D

Dang those are some impressive numbers. I never would have thought it would be possible with that small of a bore and intake that small. Years ago I raced Autocross with a couple of VW GTI's then I got into Rallycross and never looked back. I spent a ton of money building a Group 2 car. Now I...

Moper I have never heard of that. Too cool.

Good info there 273. Sounds like the idea may not even be worth it and may try to get as much as I can out of 273 cubes. I wonder how much one can be punched out and just keep the same 3.31" stroke? I have checked out wild&crazy's tread in the past and have actually cleaned up the bowls and...

Don't remind me. :D

SCCA Solo racing rarely gives you a chance to get out of second. They really like to limit speed. It's more tight and technical racing. Cars like this Mustang would be the competition. Most courses are actually tighter than this. Fox Mustang Autocross SCCA C Prepared CP - YouTube

Rob there are a ton of variables here. LOL Why the heck couldn't ma mopar make a 302.

Hmmmmm thanks Tony