I keep catching my self with this backwards block, with the exhaust on the flywheel side. Anyway, First thing Im doing is getting rid of that Rupp exhaust adaptor, big restriction there. I plan on trying OMBW's rupp HS40 header. Cant do tooo much with the porting, everythings just so thin, but each small thing adds up.... Intake flashing and the sharp corner on the right side of the port can be smoothed out. exhaust is the same, flashing and the corner on the left side of the port smoothed out. thats all im doing, Tecumseh uses the cast-in unitized seat assembly. I guess one could rip it out and weld it up for big, real, seats but still theres only about 3/16" between the seat as it is..:shrug: That timing wheel came from windber....i think i got it from peekster or ????? I cant remember anymore.
BTW tommy at dynocams said im gonna loose .010" off the stock basecircle, no way around it with blending the welds