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**argonaut** · 10-09-2013, 02:14 AM

With a 305, I'd run 4.11s for sure. You'll probably get better gas mileage because you'll be running in a better part of the powerband.
'63GENIII and I both have 100 cubes on you so that's probably why 3.73s sound feasible to us.
In your case the auto trans and torque converter end up picking up a lot of the slack for bad gearing. I stand by my recommendation for 4.11s

10-09-2013, 02:14 AM	#9
argonaut Senior Member Join Date: Aug 2008 Location: Long Beach, CA Posts: 1,813	Re: ReGearing Questions - Noobie With a 305, I'd run 4.11s for sure. You'll probably get better gas mileage because you'll be running in a better part of the powerband. '63GENIII and I both have 100 cubes on you so that's probably why 3.73s sound feasible to us. In your case the auto trans and torque converter end up picking up a lot of the slack for bad gearing. I stand by my recommendation for 4.11s __________________ Jason M. @argonaut62 1972 K5 Blazer CST, Turquoise 1966 K20 Short Fleet Pickup, Big Ugly 1964 C10 Short Fleet, Gertrude 2001 Porsche 911 Carrera 1996 Ford Bronco XLT 1980 Jeep Wagoneer 2008 Honda CBR1000RR 2005 Honda RC51 1981 Honda CB750C No dis-assemble Johnny Five! No dis-assemble! Last edited by argonaut; 10-09-2013 at 02:22 AM.