MOTOR RB26 OPTIONS

k20a2/ k20a3 blocks Is there any major dif. involving these two. I'm conversing just the blocks. As in would a K20a2 block be considered a more sensible choice in sleeving around the A3? The A3 are so cheap to return by so I just wanted to know.See aspects See details A lot more pics 3sgte engine awd Complete assembly toyota - A block style similar