zachary A makoff
Newbie
I'm swapping a new motor into my 98 k1500 as the stock 5.7 Vortec started knocking right after I was done putting a new tranny in and I'm at a crossroads. I have access to two motors. One is an aluminum block 5.3 and the other is a 5.7 ls1. I don't know which one to get so I could really use some help as well as what are the pros and cons of each motor for the swap