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Customer q:
I'm replacing the heads on my stock 5.6 vortec 350. I want to use the Chevrolet Performance 12558060 SBC Cast Iron Vortec Cylinder Head 170cc Intake Ports and the Comp roller tip rockers self aligning. Can I use 1.6 ratio with the stock heads and without modifications or will I need to stick with the 1.52 ratio?? What rocker arms part # will work with my application? Will I need to measure for new pushrods or is there a kit with roller rockers and pushrods for this application? Thanks
CAR MAKE & MODEL
ac = Yes
drivewheel = 4WD
engine = 5.7 V8 Vortec
fuel = Fuel Injected
make = Chevy
model = K1500 Suburban
pwrbrk = Yes
pwrstr = Yes
trans = Automatic 4L60E
year = 1999
JEGS ANSWER:
Max valve lift is .475. If using a 1.6 rocker puts you over this with the cam, you have chosen you will need to use 1.52 stock length pushrods will be used with factory roller cams.
car specs
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