Thank you. You took a interesting approach with the heat shield. I understand that SD Performance taps and plugs the two passages on the 67' intake manifold that pushed exhaust heat to the underside of the carb. Pontiac figured out that this was a bad design and corrected it in 68'.
The broader dimension heat shield is a novel idea. I ordered a heat dissipater plate from Ames and we'll see if it works. Thank you for sharing the CAD design for fabrication. You may want to consider starting an aftermarket products company!
Did you run into hood clearance issue with your carburetor spacer on a 67' Pontiac Firebird? I have not heard that a 1' spacer causes a hood clearance issue. I assume that the air cleaner height is a factor. Either way, thanks for the recommendation on the supplier.