Stock 4.8/5.3 heads off my 03 - cheap
#6
what casting is better? 5.3l? well i guess thats not a very good question...what are the specs ill say on them? whitch head is better for NA power....like lets say if i was to mill them down?
#7
look on the pass side head towards the front. There will be a number right under the edge of the valve cover visible plain as day without removing anything at all... thats the casting number...


