The results are in with the new powerglide.
451hp/509ft-lbs@wheels
Boost was set to 28psi and I was NOT running the nitrous.
The car is running pig rich so I suspect it will gain another 40-50hp@wheels with tuning. I am pleased considering this is using an auto tranny which typically read lower than stick cars on the dyno. The last time I dynoed the car it read 311hp@wheels and ran 129.6mph in the 1/4 the following day . Unfortunately, I did not have my nitrous bottle back from being filled. I will run the car in two weeks after I get the transbrake hooked up and new front tires. Anyway, not too bad considering the head only flows 200cfm on the intake ports