I Chose the 383 Big Block

[TommieDuster76]

So, I ended up buying a 383 Big Block for my 76 Duster. Stamped 2468130-9. I have a 727 Transmission and a QA-1 K-Member. Any suggestions for Motor Mounts, Carburetor, Headers for this application? I'm using the stock suspension with the K-Member.

 

[abodyjoe]

motor mounts is what QA1 recommends.

headers depend on your build. Schumacher tri-y are nice, pro parts by tti are kick *** but i think they are for a raised block.
carb depends on the build too.

 

[Demonracer]

What engine was in the car originally?

 

[DionR]

Might be worth asking a moderator to move this thread to the Big Block A-Body section, it's in the New Hemi Swap section right now. Probably going to get more feedback over there.

 

[TommieDuster76]

What engine was in the car originally?

It was a Six Cylinder. Im told the QA-1 Crossmember is for a small block so Im thinking small to big block mounts.

 

[abodyjoe]

It was a Six Cylinder. Im told the QA-1 Crossmember is for a small block so Im thinking small to big block mounts.

call qa1 and find out exactly what you have and exactly what you need.

 

[Brooks James]

Elephant ears motor mount, lots of clearance

 

[toolmanmike]

Might be worth asking a moderator to move this thread to the Big Block A-Body section, it's in the New Hemi Swap section right now. Probably going to get more feedback over there.

Moved to big block.

 

[rumblefish360]

The Elephant ears are really good and stiff keeping the engine where it needs to be. Look into Manciniracing.com and see if they have the swap mounts.

Another header is made by TTI. They also can supply an entire exhaust system for there own headers for your car n 2-1/2 or 3 inch tube size.

The carb depends on what you’re doing with the engine/car.
A 600/650 for a grandma easy driver is fine, 750 for a little more performance, an 800 Edelbrock or 850 Holley for a beast engine.

Just treat the 383 like a big small block and you’ll be fine.
Cam it like a 318 and it’ll be great new matter the performance level sought. It’s just @ 383 cubic inches with the short stroke, a big cam is going to make the bottom rpm band mushy and even more so if the rest of the building spot on as a combo.

 

[RustyRatRod]

You won't be disappointed. Good choice!

 

[middleagecrisis]

I'm going this same direction on my '75 Duster (383, 727 & 8 3/4) and will be relying heavily on the Big Block A body tech forum to get me through the swap. Motor currently has elephant ears, as it was in a '70 Duster drag car, but I'm thinking schumacher mounts to help with alternator alignment.

 

[TommieDuster76]

The 383 appears to be seized. I have PB Blaster and a braker Bar on it now. Stay tuned!

 

[rumblefish360]

Transmission fluid is also very good. A little in each cylinder.

 

[TommieDuster76]

Transmission fluid is also very good. A little in each cylinder.

Thanks for the tip!

 

[middleagecrisis]

The 383 appears to be seized. I have PB Blaster and a braker Bar on it now. Stay tuned!

That sucks. Were you planning on taking it apart to inspect before installing?

 

[Mopar Fred]

The 383 appears to be seized. I have PB Blaster and a braker Bar on it now. Stay tuned!

You can use AERO KROIL it works great on rust and it’s fast. You can buy it at NAPA

 

[dartindanno]

If you didn’t already pull the intake. A bent pushrod could be the culprit keeping it from turning

 

[Mopar Fred]

If you didn’t already pull the intake. A bent pushrod could be the culprit keeping it from turning

I would pull the heads and then see if it turns

 

[Carnut68]

The 383 appears to be seized. I have PB Blaster and a braker Bar on it now. Stay tuned!

Now go find a 440.

 

[RustyRatRod]

Sea Foam is also a miracle worker.

 

[fishmens67]

Now go find a 440.

Nothing wrong with a 383.

 

[Mopar Fred]

Nothing wrong with a 383.

Low Deck make great HP and TQ…..Go 383 BB and you won’t go back

 

[TommieDuster76]

That sucks. Were you planning on taking it apart to inspect before installing?

I bought it with no expectations. Was hoping to clean it up and put it in the car but it is 55 years old right? If I need to build it its ok...

 

[TommieDuster76]

If you didn’t already pull the intake. A bent pushrod could be the culprit keeping it from turning

I pilled the intake and valve covers, everything looks ok....Only VERY DRY,,,,,I oiled the hell out of it.

 

[TommieDuster76]

That sucks. Were you planning on taking it apart to inspect before installing?

I really had no expectations.