I got mine on ebay looked up a 99 Cadillac escalade 5.7l and got the complete wye pipe assembly complete with cats for under 200 bucks direct bolt on no cutting required
I put a billet aluminum distributor on all 3 of the v8 vortec truck me and my family had 2 98 k15s and a 99 obs k25 seirra they had enough play with adjust +/- 3 degrees but still had mounted holddown clamp