These Lunati's.

What about the Comp Cams roller lifters? I see they offer a few different part numbers, which ones do I need for a big block?

Cam is a Cam Motion roller with 705/661 lift, 281/283 at .050, 500" low deck with 440-1 heads.

I'm asking about these 2 as I can get a good discount on these. I have 2 sets of roller lifters, but I'm not sure if I should send them in to get freshened, or just sell a set and put money with it to get new ones.

And no I can't afford red zones.