Quote:

I think the this topic started with using a .60 over 383 block and a 440 block, that he had. the 400 block wasnt the in the question

Thats why my last post says what it says. All posts so far have tried to provide help, and a lot of us believe the right direction is to bail on the 383 and 440 block and go 400. But that is up to the OP and what he intends to do with the combo. If it is a low power bracket combo, and a few hp lost to the small bore is of no concern, he may chose to go that way (383) and it would be fine. Ditto on the 440 block if the cylinder walls check out better and it makes a better low hp bracket motor, the choice may be the 440.

8..603 156 mph best, 2905 lbs 549, indy 572-13, alky