I have searched the forum with no luck so far. im running a predator 212 hemi head with boxstock bored carb mod 1 cam 18# springs and i bought a jackshaft but was wonder ing about the ratio i have a 12 tooth clutch and 54 rear sprocket the jack shaft is 13 and 15. One way i get a ratio close to 5.2 to 1 and the other way i get 3.1 to 1. Which would work best i want the speed but dont know if i would lose too much torque. Suggestions or advice appreciated greatly