Two 1/4" bolts secured by nuts in a piece of angle-iron about 5 1/2" long by 1" wide.  The bolt hole spacing is nominally 4 1/2" for 94 and later but it was more like 5 1/8" for my 91; I would expect that to be true for 92 as well, and probably for older cars too.  93? ... I dunno, 93 was a transition year.  Bar material should be angle-iron (steel, actually), not flat steel (my 1/8" mild steel bar bent badly and often!). Quarter-inch bolts 1" to 1 ½" long should do.

 The bolts fit into notches in the tensioner brackets; careful inspection of the brackets should make the intended use obvious.

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