It looks good, that's about all. When you really need it, while the engine is warming up, it's as useless as windshield wipers on a duck's butt. Exhaust gas is several hundred degrees at a minimum and it happens s soon as the spark plugs fire. Coolant gets up to 200-ish degrees after several minutes of operation. As the pointy-eared guy on Star Trek would say- - - -"That isn't logical!"
Jerry
I always wondered how much good that would do. I have a 4 bbl intake for my 235 that's from the early 80's made by what was then called Clifford Research. It has 2 copper lines that you welded bungs into their headers and circulated exhaust gases through a plate on the bottom of the intake. I also have the block under the carb that hot water goes through.
