if you do a search on this forum for frankland. i posted some pictures of a Championship Frankland quickchange.. it might have been on the H.A.M.B (jalopyjournal) easiest way to tell is a a Champ will have 8 ribs on the side bells... A champ frankland has pretty much dana 60 stuff inside, but not all dana 60 posi units will work, but i am told some will, the dana 60 single track units will work...they have standard 31 spline axles in them so ford axles will work in it..
the rear end i got was a champ style frankland, it had wide 5 ends on it
*note* wide 5 ends are not 5 on 5 inch bolt circle, and about the only choice of wheel you have is a chrome or painted steel wheel, and you wont get a front skinny wheel to match to good.. in the lower picture that is a shot of my rearend with the ford 9 inch ends that i put on it. So if the rear your looking at has the wide 5 ends on it, either you have to convert it or use the wide 5 setup with an adapter for the 5 on 4 1/2 or 5 on 4 3/4 probably cheaper and more practical to just convert to a 9inch flange... also if it has wide 5 ends there might be camber built into the ends, the ends will be on an angle( not parallel with the tubes)
One thing to look at is the side bells where the bolts go through the tubes, that is where they crack at, before you buy it look close and make sure theyre not cracked, if they are cracked jew him down cause that will just add to the time you'll have to put in the rearend, or to have someone tig weld the cracks, a couple little cracks wont hurt, but if theres a bunch of cracks price the side bells before you make an offer..but it gives you leverage to jew nonetheless...
also make sure he has spur gears in it when you feel of the gears, and make sure what gears are in it, probably will have a 4:56 ring and pinion maybe even steeper, try to get him to throw in a couple sets of spur gears too.. the spur gears are what you change for a lower or higher gear ratio, the straight cut spur gears will whine like a gear drive, they have helical cut spur gears for the street that dont whine, but they put more pressure on the rear cover.. also the spur gears have 2 ratios on them, you can flip the spur gears around and have a higher gear ratio, then flip them for a low gear ratio, so you get 2 ratios from one set of gears..
the pic below, the rear has the 9 inch ends on it, i cheated and done it myself, i used a piece of steel bar stock ground to the small dia of the 31 spline ford axle and passed it through the housing and used that as an alignment bar to weld my ends on.. the tubes were bent a little, about an 1/8 to 3/16 but ive seen worse on 9 inch fords for sure.. more than likely if the rear your looking at was in a stock car, or sprintcar it will be bent to some degree, just count on it, stock cars and sprint cars get beat to crap for sure..
Now i can put old ford truck 11 1/4 drums on the back, and run any wheel i want, when i order my axles i'm getting dual bolt patterns 5 on 4 1/2 and 5 on 4 3/4...better choice of wheels, and i could even put a set of bolt on rear disks like wilwoods or aerospace brakes if i wanted too later on..
now for the down and dirty, my frankland quickchange cost me $200 bucks without spur gears, he couldnt find them but he said when he did he would call me, i'll probably just get new ones, theyre $60 per set... i had 2 small cracks on the outer bolts on my side bells, one on the front and one on the rear on one bolt hole on opposite sides, my sprintcar friend said not to worry about it, a t bucket isnt heavy enough to hurt it, i will probably just put a tack weld on them and let it ride.. i cut up an old 9 inch housing to get the housing flanges off it, and used brakes off the same reareand... it also has a spool in it, eventually i will put a single trak in it but i'm not worried about it now, because i'm just in the setup stage right now.. might get a limited slip unit later on, who knows...
if you have anymore questions feel free to ask, i'll answer what i can, and i can ask my friend anything i need to know about them..
Winters is what most of the sprintcar guys around the country run , i'm pretty sure thats the brand that speedway motors sells. winters also has a nice website that has pictures of the different style rearends you just have to dig for them..
theres a Speedway Engineering that builds quickchanges also..