LS1 Ironblock?

[RedHeartbeat]

would be best to get a complete LS1 rotating assembly to put in it. The 5.7 balances different than the 5.3 so you'll have to get the entire assembly balanced to work correctly if you use a 5.3 crank in a 5.7L engine.

[C-WAY]

I would have to get the LS1 crank anyway cause the 4.8 crank is different than the 5.3 one I suppose...Im still debating about this project, but well see how it goes, it would be fun to build up and learn everything.