I will have to agree based on my recent experience. I had a top end kit installed with a custom mild grind billet cam under oem lifters for about 30k miles over 4 years. When I pulled it recently the cam and lifters showed damage. Several of the lobes were badly scored. The car was a driver and well maintained. Oil pressure was good. I've showed that cam to several engine builders and no one could positively identify what happened.

I've replaced the cam and lifters along with some springs and timing set, but am concerned if it will reoccur.

 

I don't that the selling point of a "billet" cam was ever hardness of the lobe surface anyway. It's supposed to be stronger in cross section.

Rich Krause

 

I also got the GTP-6 cam going in my 388" stroker. I will be using the 977's and the question I have is I have a Hydra-Rev kit. Do I still need with these springs?

 

From searching through some posts of his, I understand Mindgame likes the revkits because of their ability to stop collateral damage, but I'll let him answer that for sure.

For a while a head porter on this board preached that they were basically a bandaid for improper spring selection and not necessary, but I like to take the advice of guys who are (much) faster and experienced than me .

I had picked up a billet GTP cam last year, but after taking it to GTP, Craig believe that the lobe damage (tracking out) was due to inadequate spring pressures (among other variables).

Ryan