How much HP can magnum rods take happily

I had a 327 Chevy TRW forged pistons in a 360 block years ago when 360 pistons were far and few between, they had if I remember right a 1.67 comp/height and 10.5 comp. with 68cc heads. Which worked out with the 360 rods and stroke. What did not work out so good was the valve notch, with the 18 degree Mopar heads. The valve notch ended up in the thinnest part of the top of the 327 piston, seriously limited cam chooses.

The rod bushings that were used at the time for the .927 pins were out of a International Harvester engine. Can't remember if the bushings were resized for the pins or the rods.