DETAILS, FICTION AND 13B REW MOTOR FOR SALE

k20a2/ k20a3 blocks Is there any important dif. concerning these two. I'm speaking just the blocks. As in would a K20a2 block certainly be a more sensible choice in sleeving over the A3? The A3 are so low cost to come by so I just planned to know.These guys had lots of alternatives and best deal on rebuilt engines with ideal warranty to stand by th