want more power from my 318...

sorry I haven't replied in a while I've been really busy and now my car is in a shop getting some body work done. I changed that 273 rocker out with a stamped rocker for a 318 and it runs a lot better but it still has a slight tick when it's running on that cylinder.

Where can I get a set of 302 or magnum heads cheap and in good condition?

318's love magnums. It's an easy conversion also. There were a couple of guys selling rebuilt magnums on here for a good deal. Here you go. He may still have them. Just PM him. http://www.forabodiesonly.com/mopar/showthread.php?t=87995&highlight=magnum

Here is another set for sale. http://www.forabodiesonly.com/mopar/showthread.php?t=84997&highlight=magnum