Mopar 284-528 mechanical cam

Thats a 240* duration mech. cam. The Solids loose a little duration to a Hyd. cam due to lash & Centerline (Whats ground in and where it's installed at) has a lot to do with the idle quality as well as the overlap.
I can tell you about a oval track/288 MP Purple that idles like a choping axe and a royal pain down low.