Re: L.A. Built 70 Z28/Smog
 

Thanks Randy. I just took a look at the one at Classic. That one is for the BB cars. The part number for the Z28 shield is 3972156. It is a different shape with the part number stamped into it. A guy from Cal sent me some pictures of his original one, but the pictures are trapped in my old computer.
John..It is my understanding that the Cal built and sold Z28's had the heat shield, 4 nipples on the canister, and the vent tube on the front bowl for the hose from the canister. I have the 4489 carb[bought it from Eric] and the original canister. The 2156 shield is the elusive part.

Re: L.A. Built 70 Z28/Smog
 

I thought the part # on the Carb for a Van Nuys '70 Z28 with a 4 speed was 4555. https://www.yenko.net/ubbthreads/images/graemlins/no.gif

Re: L.A. Built 70 Z28/Smog
 

1970 Z28 Carburetor (780 cfm Holley) A/T List 4490 GM # 3972120
4 Spd List 4555 GM # 3972121
A/T w/NB2 List 4554 GM # 3972122
4 Spd w/NB2 List 4489 GM # 3972123


This is from www.nastyz28.com

I spent a lot of time trying to figure all this out about the CA emissions. The 4489 has a different front bowl than the 4455.

Re: L.A. Built 70 Z28/Smog
 

My Calf built 70 Z has the M21 4 speed and the carb # is 4489. part # is 3972123