If you want performance you'll have to sacrifice mileage and run a lower gear. If your not happy about it just get a taller tire. With a 28" tire you'll cancel out the gearing.
rear end on 1986 elky :?:
- Thread starter Derpinguin44
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Hmm. I've already made up my mind about getting 3.73 gears and a posi locker.
Problem is right now money, and one last question...
How big is the gear box? 7.5 or 8.5 inches?
Problem is right now money, and one last question...
How big is the gear box? 7.5 or 8.5 inches?
All G-bodies came with a 7.5" except for the 200hp-up Turbo buick's and some Olds 442's got 8.5"s.
8.5's fetch $600-$1000 used, everyone wants one(including me) and finding one at the junkyard is like winning the lottery.
You can buy a ready build ford 9" or GM 12 bolts from Currie or Moser that drop into g-bodies for about the same price, but they will take more abuse.
8.5's fetch $600-$1000 used, everyone wants one(including me) and finding one at the junkyard is like winning the lottery.
You can buy a ready build ford 9" or GM 12 bolts from Currie or Moser that drop into g-bodies for about the same price, but they will take more abuse.
Ya the stock one will explode with only 300hp. I am about to aquire a 12 posi from a chevelle to maybe put in mine but will probably end up selling it. It's a 4.11 and I have a 3.42 and the gas milage really sucks with the three speed. anyway a rear end from an A-body like the chevelle will fit and is usally cheaper by a couple of hundred than the rare GN or 442 one.
it's only like 2 inches total and if you put in a new rear end i would hope you would get new control arms. So just get adjustable ones and get the extra traction. Also just get a bigger back space on newer rims. eithier way it would be worth it! the 7.5" is crappy and the new rims with 8" wide rims will make a huge difference!
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