I ran an HEV in a small block years ago.

1st cam wiped out in 200 miles. Although I insisted we used the correct pressure springs, they told me the reason it wiped a lobe was because I hadn't purchased the springs from them.

After I dug all of the metal out of the pistons, I built another motor and had a 2nd cam wipe out in about 1500 miles. Although I had used their cam, lifter, and spring combo... they told me my block had poor lifter bore geometry, and would not cover any costs of the repair.

Then I bought new pistons, new bearings, rings, etc...bored the motor .010" over, BUSHED the lifter bores as instructed, and broke the motor in on the dyno with the outer springs only as instructed. It wiped out ANOTHER cam of the same HEV profile.

I'll let you decide if you want to buy or use anything from them...but I put a roller in it, and never looked back.

You don't need a killer attack roller lifter profile. Every production car on the planet has a roller cam in it...so the durability is fine if you use the right parts.

Call Dave and talk to him. After he explains to you how stupid you are you will probably never buy anything from him. Big hint:. Don't mention Moparts to him unless you really want the conversation to go off the rails.

If you decide that you just have to have one of his cams, bypass him and get it from the source.

I recall him posting a little diatribe against Moparts years ago when some of the members built an engine for some contest. Calling them amateurs and looking down his nose.

Decided right then and there he was a vendor I chose not to support.

I ran two of Daves cams in small blocks, a hydraulic and a flat solid, both made good power. Both engines were ran five years, when the engines were tore down both cams were worn on the nose of the lobe and had porosity on several lobes. I used good oil with eos added, and Hughes recommended springs. For what it's worth Ryan Johnson told me later that he didn't like their springs, said they didn't hold up well. I now run a solid roller.