Anyone know what the spec on this is. I bought a crank that was supposed to be from an LT1 but It has a keyed hub on it. I dont have a loose hub to see if I can still use it. So im hoping I can just mic it and see if it matches. Also, does anyone know if they taper or anything like that?

 

i think same as small block no taper look for one piece seal

 

A stock crank has a keyway cut into it just the hub is not cut for the key so none was used. As said the LT1 has the same dimensions as older smallblocks.

 

One piece is on the left. Two piece on the right.