banjoman

I have an 05 silverado with 5.3. Developed the dreaded cracked head (castech). I've found a set of 243 heads to swap out. Truck already has a cold air intake. Diablo predator and cat back exhaust.
1) do I need to mill the heads to get proper compression ratio?
2) thinking of a cam swap to take advantage of the better heads while it's apart. Recomendations? Nothing crazy as I use it mostly for pulling my boat or atv trailer.
3) which short tube headers? Don't want the expense of going to lt's.

Thanks for your input

batboy

iTrader: (6)

Yeah, you'll need to mill the heads about .020" to get the CR to equal the 5.3 heads. Comp Cams 212/218 low lift with LS6 springs seems to be a good truck combo.

banjoman

Thanks for your reply. WOW 177 veiws and only 1 response....HMMMM

AndysC3

iTrader: (14)

+1. I would mill the heads about .30 for the compression, dont forget to check the lifter preload when you mill the heads.

darnie

iTrader: (1)

x 2 i milled my heads .12 bumped up the compression alittle but bairly cleared 7.4 rods id deff check em before you bolt them down

AndysC3

iTrader: (14)

My heads are milled .025 and I needed a 7.375" push rod for proper preload.