traction

[big10ratrod77]

hey guys ive been lookin at some options for my truck as far as a good locking differntal for my 77 c10 i dont want to use a posi unit becouse ive herd of people being thrown for a loop in icy weather with a posi. so ive been looking at like air locking differentials so i could choose when i want it locked and when i want to be a one wheel wonder again. my main problem is getting stuck in mud and soupy orange clay and i wanna be able to lock it and hopefully do a better job of getting out of the mud. i know on some tractors they have a pedal you can press down and lock the rear end and that helps abunch if you dont have front wheel assist, is there enything cheap(300 doller range) like this on the market? thanks for the help guys and if ya have eny other tips about getting unstuck feel free to chime in.