What the biggest wheel/tire I can fit...
 

I want to get a 5th 16"x7.5" Cobra R wheel like the ones I have to use as a spare but I'm not sure if it'll fit. I plan on upgrading to some Baers in the future and I know my stock spare won't fit them. Any suggestions?

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1984 1/2 GT350 (#842 Hatchback w/ T-tops), 302HO, Comp cams Xtreme Energy cam, Carter 625cfm carb, Weiand Stealth intake, MSD distributor, MSD coil, FMS 9mm wires, 1 5/8" MAC unequal shorties, 2 1/2" MAC Prochamber H-pipe, Flowmaster 2 chambers, KYBs, 16"x8" 4 lug Cobra Rs, Falken 245/45ZR16s