How much money do you want to spend and what class do you want to pull in? You can start by overhauling the engine and installing a set of M &amp;amp; W high dome pistons from Korves Oliver. Deck the block to increase HP jet the carb and you will have plenty of power for the stock classes. From there the sky is the limit. You can have a big CI stroker engine built that will produce over 200 HP @ about 1900 RPM&#039;s but it gets expensive. You can also build one yourself using car pistons and rods if you are a good mechanic.