I run no crossover on my old 307 and my new 454. I have never really had a problem with cold weather, I even daily drove it with both engines. But, I do have electric fans so I just leave them off till the engine warms up.
cylinder head help
I'm looking at either the edl. performers or the performer RPMs to bolt on my street driven 350. It seems the only difference is the heat crossover. Is it something that's needed? I would also like to run a performer air gap to top things off, but I don't think it has provisions for the cross over. Just wondering what difference the cross over makes if any. Any advice is greatly appreciated.
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Also, if you do use the heat crossover, make sure you run a carb heat shield, the hot exhaust in the manifold may boil the fuel bowls.
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