OEM should be 4:10s.
check this out, it's our bible,
http://www.pirate4x4.com/forum/showthread.php?t=775780
and here is a link to a FREE "factory shop manual" in pdf,
http://www.ncttora.com/fsm/1985/1985FSM_OCR.pdf
it covers your 82. not a cheap haynes/chilton book. it's the real deal.
you gotta mouse motor in that? wish i had yours.
have fun!!!!!!
owner 93 toy pu 4x4 3"lift 33"s