Spare tire and rim size for 70 Duster

The BigE,

What did you finally decide to do? I am researching the same issue for my 70 Duster 340. Coker Tire makes the E70-14 FIRESTONE WIDE OVAL RWL for $169ea. I am sort of tempted to bite the bullit and buy one for my spare. However, is this the correct tire for a 70 Duster, or should it have been the Goodyear Polyglass? It is hard to find a decent spare in a 185/75-14 tire size. The only other option might be a 195/70-14 BFG Radial T/A. I have BFG Radial T/A's on the car now and would like a matching set of 5, but don't want a big hump in my trunk.

Let me know.

Thanks,

ijg4503