[Dave at Pelican Parts]

I think it was designed for the early one simply because that was what the original designer had around. I noticed that my later fuel gauge modules (I had a couple of spare combo gauges) all had the same pattern on their backplate as the oil temp and pressure modules. So I took one of those and used it as a template to drill a couple of new holes (and I think enlarge the two that were there) in the fuel gauge portion of the combo gauge backplate.

No problem.

I also used the 911 combo gauge housing, as it had the screw-holes in place. That way I didn't have to find and cut up an early combo gauge or a later one that had the oil temp gauge in it.

--DD