RE: Modifications
I did not read the numbers, I saw them. I think we are on the same page though. The 377 was at lock up on the converter. I would put the 722.6 at 8-10% loss on just stock components. The more power to try to put through the greater the percentage lost. Much can be done with the converter to help bring the engine, and rear wheel numbers closer together.
I know different dynos will show different numbers. This is why I think a dyno is great to tune, but I don’t put any faith in the actual numbers produced.