Not just top end, bottom end as well, everything. I'm thinking if I compile all the miscellaneous parts it'll end up cheaper than buying an actual LT4 conversion kit along with the other parts I'll need.

 

All you have to do is go the the list that compares the LT1 to the LT4 and swap all the pieces that are different. But it is not a cost effective way to go. I don't think I'd want to swap in the LT4's cambered piston rings. If you do the added machining that the LT4 crankshaft has, you might just as well buy an aftermarket crank. A lot of the little odds and ends are not going to net you anything in the way of power of improved performance.

http://www.grandsportregistry.com/lt1vslt4.htm

 

I mean buying whatever crankshaft is necessary and anything else.