Will a Lt1 crank work with a tpi motor? I know that the lt1 cranks are stronger, but not sure if they will work with the L-98 350? If not what are the reasons for them not working?

 

If your block is a 1 piece rear main seal it should work. If not you have to convert the crank to a 2 piece rear main, but I do not know what is involved with that.

 

yea itd work fine, like rickyZ28 said if its pre 86 get a conversion kit, they arent that expensive from summit or jegs or somethin.

 

I just read this on a website:
CRANKS
350 - The crank for the LT1 looks just like the one in the late 350 and has the same casting number 14088526, but it’s balanced for the lightweight pistons that were installed in the LT1. Be sure to keep these cranks separate so they don’t end up in a regular 350, and don’t ever use a regular 350 crank in a LT1. In fact, if you are short of LT1 cranks and don’t have a balancing machine in your shop, you would be better off using a crank from a 305 instead of a 350 because it’s actually closer to the balance specs for the LT1 crank.

I got it from

http://www.automotiverebuilder.com/ar/ar99928.htm