will i need a new flywheel when i get my motor back.
what else do i have to change.

 

If it's an externally balanced 383 (most are) then you are correct, you will need a 400-style flywheel with the appropriate counterweighting. You will also need a 400-style 8" harmonic counterweighted dampener on the front of the engine. Also, stock 3rd gen 305s and 350s use a straight bolt pattern starter, designed for a 153 tooth flywheel. 400-style flywheels are only available in 168 tooth style, so your stock starter won't work. I highly recommend an aftermarket mini starter- much higher torque to flip over a big-cube high compression motor, especially when the motor is hot. THey alo clear msot sets of headers much easier.

That's the big stuff. THere will be a bunch of other small stuff that I missed, I'm sure, so don't try to do the install like you're meeting a deadline. There WILL be minor delays.

 

If you have a 700R4 trans, you will need a 153 tooth flexplate. Is the motor externally balanced? If so, Lingenfelter Performance Eng. carries the flexplate you need.

 

Actually, a 168 will clear the 700R4 bellhousing just fine. Did it last summer with a 400 in an 87 GTA with 700R4 trans.

 

My 386 is internally balance, i made the mistake of using my stock 350 fly wheel with my stroker. It took me alittle while to figure out the vibration. My stoke flywheel had a balancing wait on it. I ordered a b&m flywheel for a 700r4 from summit. Im pritty sure it was the same size as the stoke one. Just make sure you know if its internially or externally balanced.

 

Wrong. My starter works fine, it doesnt need a 168 tooth flywheel. My stroker kit came with the stock size 153 tooth. My car is basically the same thing as a 383 except it has smaller pistons for a .030 over 305. It starts fine when the motor is hot also (I got 10:5 CR)

You are right though about needing an 8" balancer, he will also need a new timing chain cover because the stock timing tab won't clear the new 8" balancer.

Good luck with your 383