The heads may not be 8,000 rpm heads but that's what Edelbrock says the springs are. I didn't say what springs I am installing, but I am not using the 145/385 lb. springs that were in the heads. For around 6,000 rpms max I will be using springs in the 135/330 lb. range. Longevity is a consideration.
CompCams has obviously had a problem with these lifters or they would not had redesigned them. There was no question in my mind that the heads were not a good match for the cam and lifters, that was my point. The owner let the machine shop make that decision which was a mistake. Crane cams also has a warning about not using the OEM style drop in roller lifters with very strong springs and recommends going to tie bar lifters if you do.
I removed the heads and there was no piston to valve contact.
I am concerned that the owner has a HV
oil pump and I tried to talk him out of it the way the engine is built. All the bearings are good.
I stand by my original point. Be ware of using OEM style drop in lifters with very high pressure springs. If you buy the heads complete the head company has no idea what cam and lifters you are using. You have to check it out.
I stand by my original point.
Added: This is 91 roller block. Ed, I totally agree with you. The owner and I have had that conversation.