I'm in process of building a 51 Chev sedan with a warmed 235. I just picked up a 87 S10 5 speed with a 3.76 1st gear with mechanical speedo output & the 0.72 overdrive gear. The bone yard has avaiable the following S10 4X4 Rears: 3:08, 3.42, 3.73, & 4:11, all from the 1983 thru 1993 years. I'm thinking of the 3.73 rear. I'd like to drive around town as well as cruise the highway at 65 mph. Car will be dropped a bit. Can anyone advise good rear ratio choice? Thanks, Sherman