FYI - that looks to be the VPC (Volkswager Products Corp.) P+A-dealer installed version of the AC, with the rectangular evaporator in the front trunk (the DPD version was round & flat-top-conical so the spare sat over it & lower in the trunk than the VPC version, where the spare & tire board sits 2-4" higher)
When it was in the car, you probable noticed that the control knobs on the interior duct/console sit out of line & to the right of the ashtray/ventilation-heat control sliders, with the driver vent further to the right of the steering column - vs. the DPD with the dials stacked & the vent closer to the driver. The 3 center console gauges are staggered vs. stacked too - if it was a center console Appearance Group 73-76 2.0 (or 1.7, 1.8, 2.0 optional).
Those are the main ways to tell visually which is which. Jeff Bowlsby's 914 website has pix of both from the old dealer brochures too.
GLWTS!
Tom
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