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If you want to try something, you can buy a whole irs pumpkin, or for that matter the complete rear suspension out of a t-bird for about $250, then you have the uprights, shafts, hubs, and any other bits you may need in the future. You can find them with a 3.27 or similar gear with the trac loc. I have one waiting for install with the tko600/.82 od and I think it is going to be the sweet spot, yet to find out for sure though.