Off the top of my head.... with 3.73's and stock t-5, I pull 2000 rpm's in 5th at 65mph (roughly). See? You could jump up to the next gear ratio and still have tons of wind left in the ole girl. Why would you want to do 75 in 2nd? That sounds like a fantastic way to blow a motor or bend some rods. I think you can do...probably with the same car 60mph in 2nd? Maybe even 65.
Milage? I get about 20mpg with the 3.73's and a carb. Granted, I baby this car and mosey around (step 23 on the insurance does that to a person).
Go 4.10! Do it! Peeling rubber is fun! Throw the battery in the trunk and get some drag springs.
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91 GT Carb conversion, holley 600 double pumper, edelbrock performer intake, FMS "C" drop springs, march 1000 underdrive pullies, crane 1.7 roller rockers, GT-40P headers, bassani x pipe, american thunder catback, FMS 4.56's, msd aL6, trunkmount battery, A/C eliminator kit, 3000 stall tci streetfighter, AOD with transgo kit, A+ servo, 300M hardened lockup shaft, kevlar bands and 28,000 gvw trans cooler, 3 core radiator, 300 lbs stripped with a full interior
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