1966 what gears??

[losthope]

I posted this in the drivetrain section and had no responses so ill try here:


I have a 1966 chevy c10 with the stock rear end in it the front shaft part is seeping/leaking gear oil(not pouring but small spot on the ground after it sits for a week or so), so i figure it needs to be gone through, and while i have it at a shop maybe swapping in some better gears if that can even be done....since i have no clue where to even begin or if it can be done id ask you guys what can be done to my stock rearend??? I really like to keep my 6 lugs and dont have a decent welder at my house thats a rental that only has 110v, so i really dont want to get into swapping in a new rearend if i have to weld new brackets and things like that...if gears can be swapped in what would i be looking for or tell the guy at the shop what i want him to do to it??? can i just order something from summit or jegs or else where and take it to a shop to be installed? like i said im clueless on what im looking for,just want the best combination for my drivetrain setup.......Or is 3.73 gears the best with my set up and i should have the seals replaced?? i will be driving mainly in the city but would be driving on the freeway every so often.

I dont know what info you guys need but figured some might help...let me know if you need something else:

stock crate 350
rebuilt th350 shiftkit
tire size:p15/75/r15 's
stock 66' rearend (i think it has 12 bolts)...book says/numbers i found:
C14....... (3.73) (exc. positraction)........HA

thanks for any advice !!