What are my stock heads?
#2
10 Second Club
iTrader: (10)
Your stock heads are casting#806 and are known as perimeter bolt heads. You can have those ported if you don't mind the downtime and know someone who's good with a die grinder. But I would look into some CNC ported 5.3 or LS6 heads from one of the site sponsors. If you decide to get new heads you will need to get the 99-up centerbolt valve covers and coil brackets. Are you planning on doing a cam upgrade also?