I must say though, slants do have their limits. Naturally aspirated your usually running mid 13's to low 14's. On the other hand, I've seen some forced induction setups do mid to low 9's. Juice also another great way to make power, although it is risky if not done correctly.
Never in my 47 years have I seen an natural aspirated slant 6 run 13,s or 14,s?With some sort of power adder yes they can be a mean little engine,but will cost $$,and time on headwork,cam,exhaust,intake/carb.Anyway,have fun working/learning on your car.8)