Bolt I.D. thread Series No.1: 440 engine

66340SEDAN said
How do the bolt sizes differ from lets say, a 383 or 400? Are they all fairly close in size?

BTW, awesome job :wink:

thanks ....i am going to say a 383 is going to be the same bcoz even the alt bracket is the same for 383 /440 but a different hole is used to account for the deck height difference