Too big of cam?

If you want to stay with the six, the best thing to do right now is to check the basics. That cam should not be a problem. If you do not have much experiance with engines, I would stay away from "power adders" at this time. Go over to www.slantsix.org for good advice on the slant, without the comments about swapping to a V-8. There are several slanters from your home state over there, and one might be close enough for some "hands on" help.