This is just a theory as I have not the funds to build a couple of engines just for comparative reasons. But here are two theoretical questions in regards to LA strokers vs. B block big blocks set up with the same or very close to the same displacement: 1. Let's take a well built LA stroker with a 4.040 bore giving us a hair over 408 ci and a 400 B block bored .040 over giving us a hair under 408 ci. Let's top these engines with a pair of well ported Eddy heads (same amount of time put into both), keep the comp ratio at a sane 10.5:1 and stab in a cam that is identical. Lets say a solid roller cam 250 dur @ .050 and .600 lift ground on a 108 CL. Top it off with a single plane manifold and a 850 cfm carb. Which engine will give us the most power and at what rpm? I would think that the B block would far out power the LA stroker due to the larger valves, ports and bore that would unshroud the valves and less friction from side loading due to the longer connecting rod (6.638 vs. 6.123). 2. Now, lets do nothing but reduce the size of the cam to 230 dur @ .050 and .540 lift but still a solid roller and switch to a dual plane manifold but keep everything else identical. Will the LA stroker provide more torque than the B? Will it be at a lower rpm? What about the area under the curve? Would the B block have a higher HP peak due to the bigger ports, valves, etc? Any and all responses are appreciated.