I think you're kidding yourself if you want to run a .700+ lift solid roller on the street and not replace valvesprings. This is why those "street car classes" are a joke, guys running cams bigger than this and having to replace valve springs during the event... ya real street car
My old pump gas Duster motor had right at .700 net lift on both valves with 250 Lbs. on the seats and 680 Lbs. open pressure and didn't have any issues with valve springs dying I did have the number four cam journal grooved for full time oiling to the rocker shafts and restricted the oil flow in the block down to.041, the original valve springs lost 30 lbs. pressure at max lift after 1800 miles street driving., one .030 shim fix that
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
