K20a2/ k20a3 blocks Is there any key dif. involving both of these. I'm speaking just the blocks. As in would a K20a2 block be described as a more sensible choice in sleeving above the A3? The A3 are so low-priced to come back by so I just wanted to know. https://trevoriugau.collectblogs.com/77636008/subaru-ej20-turbo-engine-things-to-know-before-you-buy