My personal opinion on power plant.
What are your goals with the car?
Street cruiser and never have the want to go fast? 383 or stock 400
Nice street cruiser and also want some get up? 383 or 400 with a stroker crank. Keep in mind the 400 is a really nice motor to stroke. It has a larger bore than the 383 or 440.
Nice cruiser and/or strip car-440 built however fast you plan to go. Also could put a stroker crank in the 440 depending on what budget you are wanting to stay in.
I personally will never build another low deck big block without a stroker crank. Bang for buck just isn’t worth it in my opinion. The last big block I built was a stock stroke 383 with hydraulic roller cam, eddy heads and performer top end with a 750. Only made 450hp and about the same for torque.
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