i had a friend put some stock size pipes on it, the system in the pics was 2.5" and rusted out way quick, it was a cheap flowmaster kit. the system now is aluminized and should last a lot longer. i have all new sheetmetal from GM, quarters, fenders, cowl hood, rad support. the cowl hood might go bye bye though, most likely won`t put it on. i think i will sell it or trade it for some NOS parts im looking for. the block is the 388 casting, i thought it might be a replacement until Jerry said it was correct and showed me the #`s matching stamping by the oil filter, huge sigh of relief, lol