heads... exhaust... intake

Mopers right. The draw back to a 360 head on a teen is not only the larger chamber decreaseing the comp. ratio even further but also ports to large to make effective useable power in most applications on the street. Even more so if the pistons are stock in the teen.

For a cheap and easy way to increase power, yea, fine. The better way is more expensive. Porting the 318 head. It is also combo dependent.
Whats yours?

I would do what Goody did and increase the tire height and T-bar height and use headers into a "X" pipe. 2-1/4 pipe to about 280 -290 HP, 2-1/2 for any HP level above that.

If your going to use the 360 heads, have them mill the deck approx. .060 for a bump in the comp. ratio. You'll also have to mill the intake surface a bit to fit the manifold. A possible elongation of the intake bolt holes may result, but thats easy to do.