Can you guess my cam?

OldmanRick said
It sounds pretty stout, especially at that rpm. It may very well be a .508" purple, as i have been around several. I'm real curious to what your initial timing is? Anything 12* or under will make a lot of cams in that range sound big...

I just double checked and timing is 24* initial with 40* at 3k. I checked vacuum and at idle the timed vacuum port reads 0, but is 12 at 3k.