Lynn, when I purchased my first/original Z back, the guy had installed GM angle plug heads. I did the same route as you and purchased dated 186 heads with 194 valves. A lot of 202 heads have had multiple valve jobs a valve are recessed increasing cc volume and lowering compression. I just had the engine rebuilt again and thought about installing stock exhaust manifolds. I decided to stick with headers because since purchasing in late 70's it has always had headers. I request screw in studs and guide plates. Also went with comp cam solid tappet, dual pattern modern cam and roller rockers. Makes great HP and decent torque as well.
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Steve Shauger
The Supercar Registry
www.yenko.net
Vintage Certification™ , Providing Recognition to Unrestored Muscle Cars. Website:
www.vintagecertification.com
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