"outside347" - Make sure that you look into the information posted here on optimizing quench in the heads. It is done by milling the heads to the minimum clearance and then custom fitting them to the piston tops. In my opinion, it is the single most effective thing that can be done to a flathead to increase efficient combustion. Efficiency adds BOTH economy and power.
Other than that, increasing displacement is a good way of increasing power. It is expensive, and a little more difficult with the early 221 ci engines.
At the very least, you can respond to this post and up your post count which will get you closer to the 10 posts you need to be a "real" member.
