I've seen slugs anywhere from 3.9 to 4.100 with compression heights as small as 1.12"....everybody mskes them and some have "generic" eyebrows that might even work OOTB.

Check around....type in Ls1 pistons....you'll see wiseco, SRP, Mahle, Diamond...the gangs all here, lol.

I like the ring pack and the low friction skirt. .015 in the hole I would take off the deck of the block or use the .024" MP white gasket that DRAM turned me on to for perfect quench

Standard rod in 6.100 but i think you can get up to a 6.300 in a 2.100 journal so the sky's the limit.

I'm tempted to fit one up just to see....i'm known to do crazy science projects like that.... the parts are easy enough to get, just need a good K1 crank to play with.