Those bearing surfaces don't look to good. You can using any gear set from a 8.8 in it. Its recommended to get a case spreader when doing an aluminumn chunk like that to get the backlash set correctly
Btw I have a whole pumpkin from an 03 irs for sale if your interested in it. 3:55 gears stock in them
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03 Cobra
06 F250
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