MOTOR RB26 OPTIONS

k20a2/ k20a3 blocks Is there any major dif. in between both of these. I'm chatting just the blocks. As in would a K20a2 block be a better choice in sleeving about the A3? The A3 are so affordable to come by so I just needed to know.Did any ever get imported listed here, or are these all engine imports only? Supra turbo is very much a probable purch