help me pick gears
 

motor: suppose to be a 383 only thing I know for sure is 350 block with 305 heads, performer intake, q-jet, summit headers with 3" collectors, 3" exhaust with flowmasters, stockish sounding cam,

transmission: 200-4r with stock torque convertor from 87 caprice

tires: 255/45/20s 29" tall

truck: 82 chevy custom deluxe swb no ac, manual windows and locks, power steering and brakes

gears in it now are 3.08s, I have some mint 4.56s laying around.

truck is used to drive to work (5 miles away) and to just drive. something about the sound of a sbc :metal:

I do not drive it on the interstate, only state highways and county roads, speed limits are 55

with 3.08s rpms @60 are around 1350 locked up tc
with 4.56s rpms @60 would be around 2000 (idk if the online calculators account for the lockup tc)

Re: help me pick gears
 

I would go 4.10's . But if you don't daily drive and like to giver the 4.56's will work.
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Re: help me pick gears
 

no don't daily it, I work 7 days in 2 weeks, 12 hour shifts and drive the truck most the time. then I drive it to the store or just go for a drive in the country or to a cruise in. have a 97 buick skylark as the family car/dd the truck is just my toy/cruiser

Re: help me pick gears
 

Well if you already have the 4.56's then might as well have some fun and spin it up a bit, after all a small block is made to spin.

Re: help me pick gears
 

yeah I have the thick 4.56s for a 3 series carrier. be lots of fun and still get decent mileage in od. should pick up speed pretty damn quick