I have a 1950 GMC 4 speed, 3/4 ton pickup, with 8 lug wheels and want it to go down the road faster. It has a 8 log full float rear end. Need center chunk hogs head. Would like a 3.10-3.50 that will fit, or up to a 4.11 Or---if I could find a 10 or 11 tooth pinion, my mechanic has everything else he needs. Any advice based on your experience doing this, suggestions, leads, referrals, any help greatly appreciated,. Thanks for your time. To reply, please email me directly at: wwhitfield@triad.rr.com. Phone: evenings: 336-765-8312. Jerry Whitfield in Winston Salem, NCarolina