THE BEST SIDE OF SUBARU JDM ENGINE SWAP

k20a2/ k20a3 blocks Is there any key dif. concerning these two. I'm conversing just the blocks. As in would a K20a2 block be a more sensible choice in sleeving in excess of the A3? The A3 are so affordable to come by so I just wished to know.Our store has acquired four engines and 2 transmissions. Pretty high quality components and wonderful custom