Stats:
RB26DETT:- 300hp, can be adjusted to 400 by a little fine tuning. Hardest swap of the RB series cuz the TT is on the driver side, this causes inteference with the steering shaft, most switch to a single turbo setup. Oil pan will have to be swapped with one from an RB25. Very $$$$$$$$$
RB25DET:-easier less powerful, cheaper, most common of the RB.
RB20:- dont know much about this swap.
VG30DETT:- My choice cuz it is available here in the states so no waiting for parts from J-land, You can find them at your local yard and since you can pull the parts yourself, you can do a good job, some cars may be shipped with cut harnesses. Parts more readily available.
V6 is shorter than an inline 6 which puts the weight further back, improves handling.
LS6:- wooohoooooooo 400hp bone stock, with a good rebuild I've seen an LS1 with 540hp motor only, talked to a guy with NOS on his firbird and a dyno slip of 700hp, and the sky is the limit with these blocks, and better yet they will still pass emission. YEAH BABY.
2JZ-GTE:- Best coice over the RB26 cuz the TT is on the passenger side, very powerful, all those 800HP SUPRAS are running on stock bottom ends
. Very $$$$$$$ but cheaper than RB cuz it is in the Sates.
Are these enough Stats for you????????????