Today I installed a Harrison R4 compressor on my 1981 300SD. The two washer/seals for the back of the compressor which fit the stock Behr just fine don't fit on the Harrison. I found these two listings on Ebay:

Compressor Shaft Seal Kit for GM Harrison A6 R4 w Steel Seal Murray 207253 | eBay

Four Seasons 24338 Sealing Washer Kit 5 8 GM A C Compressors Harrison A6 LR4 | eBay

Since the first listing says that the seals are for both the A6 and the R4, I was hoping that the seals on the second listing might also fit a Harrison R4. Does anyone know exactly which seals I need? Thanks

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'81 300SD