What is the max horsepower rating on a 72 440.

[Malon3y]

I have to do a rebuild for my 73 Charger and I figured might as well improve the performance while it’s torn down. I found a top end kit dyno’ed at 620 horse and 576 lbs-ft from trick flow. I’ve ran into problems with flat tappet lifters in the past and was thinking of swapping to hydraulic lifters. Eventually I also want to manual swap with a T56 or T56 Magnum. Will a stock 440 block handle power in the 600’s? Also has anyone done anything like this before? I don’t want to fall in love with unrealistic numbers.

 

[PRHeads]

If you duplicate that TF build, you’ll be fine.