I have a standard Engine stand with the 4 different arms, need to know the size of the bolt for holding the LS1 on there, I dont know what size the bellhousing bolts are or if they are like the standard sbc size.

 

found out they are 4.5" or 90mm long, now I need to find out how big around they are, they are metric threads of course.

 

here is where you can get some. it don't say what size he say special made.
http://cgi.ebay.com/ebaymotors/LS1-L...spagenameZWDVW

 

found out 90mm long, 10mm in diameter with 1.5 pitch

 

I went to my local hardware store and bought some.

 

10mmx1.5 pitch length will varry by the stand.