K20a2/ k20a3 blocks Is there any significant dif. in between these two. I'm conversing just the blocks. As in would a K20a2 block be considered a better choice in sleeving over the A3? The A3 are so cheap to come back by so I just desired to know. mazing support. https://jdm-toyota-3sgte-engine-f49975.get-blogging.com/33110324/new-step-by-step-map-for-4age-20v-itb