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Thanks for the quick reply. Ok, so why would the 'Doba have a different thermostat housing? MOPAR's method for hair removal? The spread on a typical 318/360 is about 3.5" across. This manifold has a spread of 2 7/8" across. Insanity production from Ma MOPAR!

It don't, they all (SB) switched in the mid to late 70's early 80's. That was a good quick reference. Takes the smaller stat too