No worries, all good And again I do agree but if we go off of what's been said, that it rolled 315/350 on a chassis dyno and then proceeded to trap 89mph....... it has to be down 150 crank horsepower or so?

I think a huge difference that -can't- only be attributed to a dual plane (in my opinion).

Still want to see the dyno sheet but it's soooo horribly far off my only ideas are-

-it has massive fuel pressure drop/starvation

-it burned a plug wire or 2, dropping cylinders which would result in false lean numbers on the wideband.

Most useful thing aside from the dyno sheet would be a data log. For whatever reason doesn't exist, should be easy to obtain.