Valve to piston clearance

I along with a few others I've found through searching the forum are running cams with similar specs on stock Magnum pistons with no issues, I believe the KBs with valve reliefs have more room for the valves than stock pistons with the slight dish so you should be OK. One way I checked just to be sure the valves wouldn't smack the pistons on the first fire-up, I had a helper run the oil pump with a drill while I slowly rotated the engine over several times to let the lifters pump up. I was worried about it until the first time I stomped on the gas, broke the tires loose and it jumped up to 5500 RPM then I figured it should probably be OK lol. I haven't tried revving it past that yet but I've heard others having no issues up to 6500+