Even though i hate to admit it i have to agree with m7h
. 1/8 nitro onroad is difficult to beat on 1/8 circuit. On 1/10 circuits it will probably be another matter but no one over here is driving nitro on 1/10 circuits, not even 1/10 nitro.
Depending on the circuit a pro10 with a lola and a 6t-7t delta can beat a 1/8laptimes but it is only for 5 minutes.