[JLMounce]

I can offer a counter to the hyd roller lifter bad thing. I have Lunati branded morels in my 455 on a mild 232/238 stick. I just popped open the engine recently to reseal the valley pan and check everything out.

At roughly 20K miles, the lifters are in good shape. Performance and reliability has never been an issue for me with these lifters, they're just a bit noisy. That said, when I reset the valves after checking everything out I put slightly more pre-load on the lifters than I had when I installed the HS rockers. This did actually quiet the valvetrain down noticeably.

I wasn't in the mood for measuring for and buying new pushrods, so I wasn't able to try out Cliff's suggestion of lashing with a .010 feeler gauge. I went about a 1/4 turn further than I did when I installed the HS rockers though. Based on my setup I need roughly 3/4's of a turn of pre-load per Morel's documentation. Previously I stopped an 1/8 of a turn before 3/4 installed the set screw and tightened to 3/4's. This go around I went all the way to 3/4's then tightened with the set screw another 1/8th turn.