Just lost my second motor. In my 03 wrx. Spun bearing not bad but no machine shops around here will touch my block for less than 1500. For that price I can get a shortblock from Subaru for 1750. So I've searched online. Lots of good shortblocks in my price range but 3 of then are from 06-07 wrx. Can I throw my heads and intake mani on a 2.5 block? Are there Ny modifications besides a retune I night need?