Found on the GRM forum:
Some attempts at searching other forums turn up that it may have been a trailer towing rig of some sort:
Anybody here heard of such a thing?
1971 Buick HT 2 Door 6 Wheel Factory Car in good Condition.Rear 2 Wheels are Hydraulic.71,000 miles. 1 of 2 left in the USA. Runs & Drives great. Older Restoration.Call for info & make Offer. Robert Stewart 610-562-8631 or 484-651-3306
Anybody here heard of such a thing?
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