I'm thinking I put too small a cam in my 360 Magnum...

Brooks James said
Car is set up to cross the line at 6500

Stock block crank, rods, heads pistons (1110 Hughes spring kit)

Regardless of whatever the actual lift you have on that cam I think the spring pressure is way to light for a 6500 rpm hydraulic flat tappet cam and especially from a single coil.

https://www.hughesengines.com/Index...bnVt&level1=VmFsdmUgU3ByaW5ncw==&partid=35162

Tom