Not interested in any more gear. its 3000rpm at 70mph with 3.23's with such short tires. Its a street car/cruiser...and I do take it on the freeway.

Also, please suggest a carb. I already have a 600 vac secondary holley but that may be a bit small.

'70 Duster 470hp 340/T56 Magnum/8 3/4 3.23 Sure-Grip