Need some pushrod help

If the valves are being hing open your gonna loose compression. It probably wouldnt run right though so you would know something was wrong.

I would call compcams and see if they have a ball/cup type.

did you have trouble getting the intake bolted up when you changed the heads ? with alot of milling even if the milled the intake surface you'll usually have trouble lining up the bolt holes. On my 440 I had to open the bolt holes on the intake up to get the thing bolted down.