Too big of cam?

It's a great engine to learn on. If you can port and polish the cylinder head including short radius improvement, and get the cam degreed properly, and get the intake and exhaust right, you'll be surprised how much torque and power you'll get. Then if you get a V8, you can apply everything you learn to build a tire shredder. If you mess up, you can usually get another /6 without spending a bundle (aluminum blocks in good shape are rare, though).