Just because, that's why
I've done the blockoff plate thing and even machined 3/16 plates to put in there.
Not a winter problem here in Florida.
I am just looking for a compound to use.
Jeff





Originally posted by Mike P
I'm wondering why?

Usually using the stainless steel block off plates works well. The big advantage is they can be removed. My own experience on street engines with crossover block off is they are a royal pain to drive in cool/cold weather because the car becomes very cold blooded.

If it's an early style manifold where the crossover actually runs inder the front of the carb and seals with the carb gasket, (which can really erode the base of an alluminum carb) I usually drill and tap the holes in the intake under the carb for pipe plugs to close them off.