i can get my hands on a aluminum block 5.3 out of a GMC Envoy that was losing oil pressure it was rattling at lil bit at idle with low oil pressure but it still ran very strong(no smoking), is this a good block to rebuild vs a 5.3 or 6.0 iron block, im wondering because im looking to do a v8 swap in my 03 silverado...yall tell me what i should do with it...