I have started to compile a pretty good list of bolt sizes in my quest to build an LS1 starting with a long block. I was thinking of expanding the list to help out ls1 owners, has this already been done. If so can someone point me in the right direction. I'm still missing a bunch of the accessories bolt sizes.

 

What size bolt holds the trans to the block?

 

In case you didn't find your answer yet, the bellhousing to engine bolts are qty 8, m10x1.5x40 bolts.

 

would love to see a bolt size sticky

 

Can you add all the bolts you have so far? I'm trying to come up with a list of the same things. Piecing my whole setup together so no original bolts to use.

 

I think almost every bolt in the outside of an ls series block is m10x1.5 in various lengths for whatever is being attached. Although, all the covers and headers attach with m8x1.25 except for the two long m6x1.0 bolts on the rear of the oil pan. The oil drain plug, kmember to body bolts, and steering rack to kmember bolts are all m12x1.75

 

There is a list with pictures somewhere, I havent seen it in forever, but the head bolts are very unique. M11 x 1.5 or 2 IIRC.