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Looking for opinions from anyone with experience either way. When I did the disassembly, the heat riser was blocked off with the metal plate in the first picture. I am inclined to restore the heat riser to full function with a stock gasket as in the second picture, I've done the same for my 216 and other 235. Is there something unique about the Corvette 235 that I should reconsider and install the block? I would appreciate any thoughts. Heat riser block plate Heat riser gasket
You will want to put the block off plate back in
If not there is way too much heat put into the intake
in order - exhaust manifold, gasket, heat block off plate, intake
All should be installed on the engine and painted together with the bolts and clamps.