360, You think it'll run on pump gas?!?!

...don't be so hard on yourself...read a few threads. You'd find many folks strongly recommend not running aluminum heads OOTB as the seats are often not very well done, the springs aren't installed to consistent heights, and a few other things. In short, by the time you take the castings, have them looked at, tweaked, and reassembled, you've added a couple hundred to the $1500 already spent.