what is the stock rocker arm ratio for a 97 z28 camaro. im trying to layout a motor and i cant seem to fint out if there 1.5 or 1.6 could some one shed some light on this for me below is the planned set up im thinking on using in a 69 chevelle ( t56 and 4.11 ) if you could give me some feed back i would realy like to hear what you have to say

Planned Set up
Doing some head work ( port matching ) reworking the chip, full exhuast, and doing the comp cam

Part Number 07-502-8
Engine 1993-1996 Chevrolet
350ci,
LT1 & LT4,
8cyl.
Grind Number LT1 XR269HR-12
Description

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Intake Exhaust
Valve Adjustment 0 0
Gross Valve Lift 0.495 0.503
Duration At 0.006 Tappet Lift 269 276

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Valve Timing At 0.006
Open Close
Intake 26 62
Exhaust 74 22

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These Specs Are For The Cam Installed At 108 Intake CL
Intake Exhaust
Duration At 0.05 218 224
Lobe Lift 0.33 0.335
Lobe Separation 112

 

Pretty sure the old-style LT-1's still had a 1.5 rocker ratio from the factory. A good aftermarket roller rocker with a 1.6 ratio will work great and keep the valve train geometry correct.