Looking for sum gear ratio info .Ive put together a 1980 chevy luv with a 4.3L turbo but i have a problem with the type rear diff im useing doesnt give much selection of gear ratios sofar the pics are 3.36 or 3.55.I have a 700r4 as a tranny 2wd and useing a bop rear.What gears would you guys pick any info would be great thankyou.