You better do your homework. Mock it up first, I'm betting you will need new valves. I don't think stock e7 valves have a long enough tip to use rail rockers. So you have a chance of the rocker ears digging into the retainer. Most valve trains that use those rockers have large tips above the retainer.
In my opinion, if you need new valves, its not worth the extra expense just to use those rockers.
302- Canfield 195's, Comp Cams 1.6rr, Jay Allen Custom Grind, Systemax Intake, 75mm TB, 05' Slot MAF, 24lbs Injectors, Underdrives, 4.10's, BBK 1 3/4 Longtubes, 3" Spintechs, 3" Exhaust. AEM Wideband
Tuner: Moates QuaterHorse BE/EA