Over the summer I took a couple opportunities to raid the local junkyard for a few parts. Unfortunately useable old car parts around here are rare so I have to get a little creative.
One of my favorite scores-
Part of next semester's chassis class is narrowing rears. The 7.5" is a weak link in the G-body cars and for a long time I had planned on a late model disc Mustang 8.8". After considering the near bullet proof 31 spline large bearing 9" and the fact that I can swap centers to change gear ratios I decided to grab one of those and use it as a narrow guinea pig. A trac loc center is a real bonus, so I checked every Ford truck rear axle tag in the yard on two different occasions. The second time I found a 78 4x4 Bronco that was missing the tag so I turned the drum on one side and with a big grin I watched the other side move in the same direction. Out of about 40-50 trucks I checked this was the only one with a track loc, so after an hour and a half of wrenching on rusted bolts I had it in the back of the wagon. Because the tag is missing and I haven't cracked it open yet I don't know what gears are in it, but I found most of the trucks had 3.50's and that'll be perfect for autocross. I also have a set of 2.75 gears I will be transplanting into another center for daily driving. I will be keeping my TH350 so the highway gears will help get the fuel mileage up there without overdrive. A third center with 4.10s would be nice for the drag strip, but that's on the back burner for now.
I suppose for a 5.3 that I will be setting up for somewhere around 400 hp at the flywheel a 9" is a bit overkill but the potential of a 5.3 with a pair of hairdryers on the exhaust is pretty intriguing. That'll have to wait until after I graduate but is on the future plans. By then I should be able to afford a larger cube motor too so hp options are wide open, no pun intended, lol!
