Originally Posted by red58
further thoughts to consider: the thermostat determines the minimum temp the system maintains, but a 350 is very unlikely to ever run lower than 180, probably more like 190-195, but that's with a 15 lb pressure cap, which is a bit much for the original rad even if it's in perfect condition ... you need to use at least a 7# cap, and it'd be a good idea to rig an overflow system as well

Bill

I know several guys with SBC powered hot rods that run well below 180.


1946 GMC Pickup - S-10 Frame, 455 Buick, TH400, original patina.

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