Help me please tryin to beef up 318

Here's a link to an article about the different types of heads that could be used.

http://www.hotrod.com/how-to/engine/mopp-0607-mopar-cylinder-head/

My suggestions for a 318 would be either the 302 castings or some of the newer magnum heads. The 302s can be found pretty easily in junkyards or on ebay and are relatively cheap because not many people use them in rebuilds. They were made from 1988 to 1991 I believe. These heads can be used in stock form and will give an increase in compression but to really wake them up they need to be ported, especially on the intake side.

The magnum heads actually flow much better than the 302s and will also raise the compression but there are a couple of problems that would have to be dealt with. One is that the magnums use different rocker arms, lifters, pushrods and intake manifold so all of those items would have to be changed as well. The other problem is that the stock magnum heads had a tendency to crack so finding a good pair would require a bit of searching.

Of course since you already have the 360 heads you could always have those milled. That would be my third choice after the 302s or magnums. Why don't you look around and see what you can find and how much it would cost before you make your final decision on the heads. I know when dealing with a limited budget you sometimes have to use what you have rather than what you would like to have.

Another suggestion I would make to improve performance is to remove as much weight from the car as possible. Every 100 pounds you remove is equal to about a tenth of a second in the quarter mile and it doesn't cost anything to take unnecessary stuff off the car.