i cant find anything so

what is a stock bore, stroke, rod leingth in a ls1?
what are the typical combos to get to 383, 402, 408
and whats difficult about each one, like requires new sleves, notching, oil pan ect?

 

Ls1 346ci : 3.898'' bore / 6.098'' rod length / 3.622'' stroke

383ci Ls1 block : 3.905'' bore / 6.125'' rod length / 4.000'' stroke

402ci Ls2 block : 4.005'' bore / 6.125'' rod length / 4.000'' stroke

408ci 6.0L Iron block : 4.030'' bore / 6.125'' rod length / 4.000'' stroke

 

guess my lt1 rods are junk, brand new eagle 6 inch h beams...

those sound really, i dont know how to put it but special...
thanks though!