I've read some of the forums and there's very little about stock height spring sets available. I want the stock HD (heavy duty) springs

From memory, the Volvo 240 may be fitted from the factory with one of three spring sets by rating as follows:
1. Light Duty (LD - not seen these)
2. Medium Duty (MD - Typical on most NA 200s save for Diesels, GTs, and Turbos)
3. Heavy Duty (HD) I've only seen Scantech sell what are called HD springs.

The difference is the wire diameter. The factory specification is out there on the i-net. I've seen it before but am not sure. Could not find it. Maybe turbobricks?

All of my three 240 sedans came with the medium duty springs.

The 242 GT was a rally suspension setup (I had a '79 grey market from Holland):
1. HD springs front
2. MD springs rear
It becomes a rally suspension with the 22 or later, the 23mm (I have one!) rear stabilizer bar and the front 21 mm stabilizer bar.

The 200 turbo
1. HD springs front
2. MD springs rear
It is a street setup with the 23mm stabilizer bar in front and a 21 mm stabilizer bar in the rear.

I won't address the varieties of set ups with the Diesel 240 offering.

SO, just like my 1990 240 DL (N. American market) with the dual-floor-pan design, it comes with stock HD springs. I can load hundreds of pounds in the rear with NO sag. It is a wholly stock Volvo 245 DL (a li'l red kumba!) WITH the locking rear differential.

The anecdotal information indicates Scantech is a brand best to avoid. Is Scantech the only manufacturer of Volvo 200 HD springs? I guess a call to the local Spokane Volvo dealership is in order?

When building the suspension on my 1992 240 GL (moon roof, m47II), I want to install NEW HD springs.

No, no lowering ANYTHING. You cannot use any spring lowering kit on any Volvo 240 without using a variable position panhard rod to center the drive shaft after lowering the suspension, even though it seems to motor okay. Also, you may have to use different-length idler arms on the lowered suspension. Else, you run the risk of premature mineshaft U-joint failure.

Any suggestions?

Thanks.

MacDuff and his three Volvo 240s (out of seven in my life thus far)!