Clean94Z

iTrader: (5)

With a stock lq4 motor swapping the heads or milling the 317's?

5.3LJimmy

iTrader: (10)

Milling 317 head to 66cc with stock .056" gasket = 10.0:1
Milling 317 head to 66cc with cometic .040" gasket = 10.4:1

Swapping to a 243/799 head with 64cc chamber with stock .056" gasket = 10.2:1
Swapping to a 243/799 head with 64cc chamber with cometic .040" gasket = 10.6:1
Swapping to a 243/799 head with 59cc chamber with stock .056" gasket = 10.8:1
Swapping to a 243/799 head with 59cc chamber with cometic .040" gasket = 11.2:1

Results are rounded to the nearest 10th of a point to give you a good idea of what you can achieve with each option.

Jason 98 TA

iTrader: (4)

With a PRC 227 or 215cc head you could mill for as much compression as you want. I could ship them well under 55cc if you requested that smalll We can mill PRC LS6 heads down to 57cc.

Hope that helps!!