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4ACES-
Like you, I'm going with a 503 ci big block. After talking with several engine builders, I was convinced that the shorter stroke was indeed better.
I'm using the Ford SVO block with 4-bolt center mains, Blue Thunder heads with 93cc chambers and Chevy exhaust ports, custom mechanical roller cam (.659 lift, 282 duration at .050 lift), single plane manifold, and 950 carb.
The reason for going with the single plane (according to my engine builder) is that the engine will make tons of torgue at low rpm already, so he suggested moving the curve up. That way, the car won't spin the tires (as much) and will pull hard after the car gets going.
Venom_S
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