Dyno testing a stock(?) 1972 440

We're doing a dyno exhibition for the locals on Saturday the 14th so they can see what an engine dyno is and what it may be useful for. We pulled a 440 engine from a 1978 New Yorker, that turned out to be a 1972 440, .040" over with 906 heads. Pistons are .160" down from the deck, so with the 906 heads we're in the 7.5:1 compression ratio range.

Changing one thing at a time, headers, carburetor, camshaft and intake manifold, we have increased 22 horsepower at 3000 rpm and 154 HP @ 5500 rpm. We started with the closest thing to the factory 383/440 HP cam that I could find cheap, the Summit Racing SUM-6400, and switched to an old Mopar Performance 509 cam ground on a 108 degree lobe separation.

As we are having the town's people and whoever else may show up, guess the peak horsepower and torque we get with each change as we make them (again), I can't post specific results until after Saturday. Hopefully we can make a head swap to a pair of ported 516 heads we've had laying around and see what difference they will make also.