[mdross1]

The only way you will ever know for certain is try each of the two gears 3:70,4:10 and decide which works the best for you.Our car has a 9" Ford back when we raced the car a lot always kept another third member with a different gear on hand,actually still have it under a bench.Having the big block with our setup Tremec TKO and 3;70 cog is ideal for the street,lack of torque is not an issue traction is at times.