Corey,
I assume you mean the SP. It is a 28 briggs, g force cam, g force carb, my porting, 11 hp head, small piston, ARC rod, ARC synchro weights, ARC wheel....think that is all. It runs awesome, I was going to go to a 31 this year, but that 28 runs so good I'm going to run it again. Also front brakes may be in my future!
If you mean the Cub, it is a stock 28 briggs. (It is actualy the one that I built for the SP) That is what we run in our local group, to keep it cheep. WE don't allow any engine mods. But we are finding it hard to find palces to race with out insurance. So we are getting into the USLMRA and trying to make a go of that.
Later
Paul