Max HP limit for 360 magnum stock bottom end?

The reason I was asking is because I'm currently running a Turbo and Last time I tuned it everytime I added 1 pounds of boost and pulled out one degree of timing I was gaining 30 to 35 horsepower. It was like a licence to print horsepower.lol
I have been running 430hp at the wheels for 2 or 3 years now in a 3250lbs car.
With the easy horsepower gains on the last tune I ended up stopping it at 620 rear wheel horsepower as the A518 stock transmission started to struggle.
I have read guys have been running 100 horsepower per cylinder but I don't know if that's at the wheels or at the crank. I imagine that's about where I would be 800 at the crank or close to it.
I know once I get used to this power I will probably be looking for more lol but I don't know many people running that sort of power on stock bottom end.