WHAT DOES R33 RB26DETT ENGINE FOR SALE MEAN?

k20a2/ k20a3 blocks Is there any important dif. among both of these. I'm speaking just the blocks. As in would a K20a2 block be described as a more sensible choice in sleeving around the A3? The A3 are so inexpensive to come back by so I just wanted to know.I have used Northwest Motors before and can proceed to give them my business. Usually excell