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so ... the parts that change in a 7.2 to 7.8 dme conversion are abs pump, gauge cluster, hvac controller and, of course, the dme. although the boxster went to the 7.8 dme in 2003, all other systems were updated in 2002 in anticipation of the change (check pet; abs pump, gauge cluster, hvac controller all changed in 2002). now, when the boxster went to the 7.8 dme in 2003 it also went to the newer 3.2 engine.
what am i trying so say? what i'm saying is that you should be able to put a earlier 5-chain engine in your car, as long as you also plug in a 7.2 dme, probably change a few pinouts, and push a 2002 flash onto the car.
you might have more luck finding an earlier 3.2, or better yet a 3.4.
thought that i'd send you some hope after the gut shot of those gut shots of your 3.6 nightmare.
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