WHAT DOES R33 RB26DETT ENGINE FOR SALE MEAN?

k20a2/ k20a3 blocks Is there any major dif. among these two. I'm talking just the blocks. As in would a K20a2 block certainly be a more sensible choice in sleeving above the A3? The A3 are so affordable to return by so I just needed to know.Related:4age 20v silvertop engine2zzge engine4age 20v blacktop partstoyota 4age engine4age 16v engineThey had