Low compression 440 dyno test

I did this last winter and I thought some of you may find it interesting.
I had a 77 440 highway patrol motor I ran the crap out of in the 90s. Last winter I took it apart to freshen it and swap the cam. I reused the bearings since the crank was reground in 1998 because I spun a rod bearing at over 120 mph.
Back then I ported the heads so I did a little more work on the 452s and put in some new Elgin valves along with a Serdi seat cut. Also cut the guides for Viton seals. I installed the Hughes 2942 whiplash cam, degreed it, and set up my old Mopar performance springs. New comp retainers too. I ball honed the cylinders and installed new rings on the factory pistons. With these smog pistons it cc'd out to 7.5 to 1 compression. Topped it with an old CH4B and a 3310 holley 750. I was guessing 350hp.
To my surprise the old turd cranked out 415 hp and 462 ft lbs!