Long story- I'll shorten it and get to the point.-
383 rebuilt 30 over, cam and stealth heads, sniper Efi. Car put down 300 WHP and around 400 TQ on a chassis dyno. decied to swap the cam to a good one, never been happy with the one in it. Pulled the heads to replace the springs to match and found the STEALTH heads guides are beat, the valves are hurt etc.... So now we are rebuilding the heads.

Mean while we have a 77 440 from a motor home- has been rebuilt and is low miles. But was rebuilt to go back into a motorhome. so it is low compression.

Here is the question

Do we go with the rebuilt 383 we have had in the car, it has hyperutectic pistons stock rods and crank. it is a 67 383. OR should we toss the rebuilt low compression 440 in with the stealth heads and a good cam. Will the additonal cubic inches and longer stroke compensate for the lower compression of the 440?