MOTOR RB26 FOR DUMMIES

k20a2/ k20a3 blocks Is there any key dif. between these two. I am conversing just the blocks. As in would a K20a2 block become a better choice in sleeving more than the A3? The A3 are so affordable to return by so I just wanted to know.These guys had a lot of choices and greatest offer on rebuilt engines with very best warranty to stand by their pr