Sounds like a fun project, I wish I had the skills to build a car from sctratch. I hope to get my 63 C20 truck with a 292 on the strip some year. The 292 is the reason I'm an Inliner there is so much information here you can spend days reading it. I know searching for it usually returns too little or too much. If the the board search function doesn't work for you try googling it i.e. "keywords site:www.inliners.org", loose the quotes of course.
Sounds like you have a 230, if what you need for the class is a 250 you'll need a crank. I'm not an expert so there may be more.
Larry
