I have been looking into completely rebuilding my motor rather than just the top half. I dont know why nobody builds them. Stock casting are perfect for a 355 and a little small for a 383 so why doesnt anyone go in between? I plan to run AIs or LEs fully ported head when i build the bottom end, right now the 355 is what ill be doing but Ive been wondering about a 370 cube motor? Kind of makes sense because a 383 is going to require more airflow and the 355 leaves a lot of torque on the table sometimes.
Looking for input and advice
thanks

 

Why?

Cubic inches = Power

You are leaving 15-20 hp on the table for no reason.

 

Plus, that increase in stroke with be MORE responsive to intake changes than the 350.

 

i understand, but wouldnt a 370 be good sized cubic inch for a fully ported lt1 casting?

 

Why not go 383, it would probly end up being cheaper. And I can not see any advantages to a 370 over a 383.

 

383 uses readily available parts.

Rich