JDM HONDA B16B ENGINE FOR SALE FUNDAMENTALS EXPLAINED

Im asking 2800US obo for this set up. Its a bare engine with all sensors, no consumption manifold or exhaust. If you propose on minimal balling, dont hassle submitting.k20a2/ k20a3 blocks Is there any major dif. involving both of these. I'm talking just the blocks. As in would a K20a2 block be a more sensible choice in sleeving around the A3? The A