k20a2/ k20a3 blocks Is there any big 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 low-priced to come by so I just planned to know. I Completely adore the oldsters at JJSmotor. Craig was prepared to reply all my queries, give tips