Since a 383 is just a 350 with a 400 crankshaft, why is there less torque with the same stroke? 13 more cubic inches and 1/8" more bore size doesn't make that much difference in the torque the crankshaft sees, unless a lot of other modifications are done. I can probably build a 383 that will out-torque a 400 by paying some attention to the connecting rod length and cam profile. That's particularly true if a custom crankshaft with internal balancing is used to build the 383.
Jerry

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