That's a good looking car. Could be competitive. Most Class 12's race SNORE for the same reasons that the fees are low and pay out can be pretty good. Entries are in the $750 range per race. And a lot of teams also only run a few select races. If nothing else; most will run Battle at Primm which is next month and Rage at the River which is in December. If you want solid Class 12 fun and competition you should really try to make those two. The best oil system for these engines in this class is a dry sump pump. In order of best to most affordable is the Daily Engineering pump then Bugpack/Scat Pump and then finally the CBPerformance. Someone Mentioned to ask Wik Engines. He only builds Class 12's with the Daily Dry sump pump only. Guys like Majors Engineering run a JayCee standard wet-sump oil pump with pressure relief return back to the case. Those are not the only ways to do it but normal oil pumps survive for years in racing. My engine has been running a normal Cast iron Melling 30mm pump for years before I bought it and my engine just broke a crank at Rage through no fault of that pump. The 30mm Schadek wet-sump pump is the other popular pump and is the base used for the JayCee pump I mentioned. My new engine build; however, is getting a dry sump now for peace of mind. The 20w50VR1 is critical out there in the heat and like I said it has zinc for flat cam and lifters. It is proven that synthetics do not pull the heat out of the air-cooled engine like conventional and should be left for water cooled engines. Your guy probably has the experience to build an engine just fine but popular Class trends vary on heads, camshaft, intake manifold, Carb Tune, flywheel weight etc that he may need to learn over time to be competitive with other engine builders for the sport. As long as it passes Tech on size, compression, manifold and venturi size it will be in the ballpark on power.
Take a look at the Battle at Primm Schedule and I hope to see you on Class12Coalition and Battle at Primm!