To the best of my knowledge the only suspension difference with the 242 GT compared to the base DL model was wider tread on 15" 5-spoke alloys, a rear sway bar (same one as in the wagons as I recall) and a heavier duty front sway bar. IPD sways were one step up again in sway bar diameter, front and rear. A PO along the way may have tried to lower it a bit as there were a couple of aftermarket sources for lowering springs cheaper than IPD, or maybe cut them down a bit. Count the coils and note the end offsets so you can verify them against stock coils. The iPD ones were progressively wound sport coils, so those should be self-evident.
I was minorly surprised to see iPD is still selling them and has them in stock. IPD suspension was a spinoff from the RV suspension mfr next door to their original store and if that shop is still in existence then may still being made there. Given the decades of inflation, I'm also surprised at the price. In the 1997 catalogue I have, they were $284/set of 4 for sedans, which is $531 today. Their current price is $279.
If you're going to significantly lower it, check the advice for going for the iPD adjustable pan hard rod to center the rear tracking to the front. Apart from sport handling, it's especially important in snow because 240s have narrower rear tracking and you'd now have one rear more fully in a front compact snow track and the other rear more outside the front track in possibly lighter snow.
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Dave -still with 940's, prev 740/240/140/120 You'd think I'd have learned by now
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