The 16:1 will be a bear esp w a 13" steering wheel. I would suggest a 20:1 either a firm feel box or the 20:1 guts from MP & put it into any common 24:1 box. It'd be cheaper & I have not done it but I dont think it'd be difficult. The flaming river one is sealed w no plug to check/add grease/lube which I dont understand/care for. We went from a 24:1(stock)to a 16:1 manual box on our circle track challenger & it was night/day better in the corners,no more hand over hand excessive movement. A buddy has a 16:1 in a BB valiant & he isn't complaining but he rarely drives it. I have a 24:1 in a light 65 dart & I dont like it, too much effort & I am going to change to power!