i had a t76 on a stock 4.8 for awhile. i dont remember all the details like how much hp on pump gas and all of that but i do remember cranking it up to 500rwhp on a mustang dyno and gteching low 11's. it would have made more power but was sliping the tires and floating the valves(stock valve springs even).

it was prety laggy but i could brake boost it to 8+psi and leave prety hard.