Are the chamfering's and radius' the same such that I don't need a crank shop to modify these parts? I'm refering to the crank main bearing radius' and the way it will mate to the B20 block.

Lastly, am I wasting my time with the B20 block with stock sleeves? I mean, I will more than likely spray a little nitrous.

 

a shop will definelty need to spin that crank and do what you want to it.
sleeeeeve it or bbbrrreeaaak it

 

everything will bolt right up, just make sure all clearances are good

and sleave it if you want to put any decent amount of power through it or nitrous at all imo

 

i'm doing this set up. i got a gsr crank cp pistons and eagle rods for pretty much free, just picked up the b20 block a few days ago just need bearings now.

 

LUCKYYYY. Im doing this set up in a B18A1, with stock acura new bearings, all the plastiguage checked out just fine, so I think It should be fine, ive heard the B20 is a LS with just a bigger bore (84mm)