Re: 1970 Z28 intake, carb, heads and air cleaner find
The 492 heads were primarily an over the counter and warranty replacement head. My 70 Z28 has a CE warranty replacement short block and one original 186 and 492 replacement head. Second owner said the engine was overheating around 1972 so he brought it to the local Chevy dealer and they installed the warranty short block and head.
The 492 angle plug head and 292 Turbo heads are different castings. The 292 head has an improved Intake port with additional material and volume for porting, and was the best head for racing use in the mid to late 70's. I have both and plan to flow test them on my Superflow bench sometime in the future. I will post the results when I get the time.
Paul
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70 Camaro LA Z-28 03B Citrus Green LT-1 M-40 3.73's
69 Camaro X-77 Z-28 10C Cortez Silver M-21 3.73's Deluxe Project X - SOLD
69 Camaro X-77 Z-28 01B Garnet Red w/Black top, M-20 3.73 Deluxe Houndstooth
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