Going a long way back in the memory banks, here. On the Scout units, the recommendation was to bend the coupler down enough to swing the truck 180 degrees, and using a conversion coupler (standard replacement coupler for a PT-1 style truck), lay it up and bend the tabs over the axles.
I think I remember the Scout couplers were cost saving to allow lower retail pricing of the sets.


I just went and checked my Greenberg's from 1978, page 665 shows how to do it.
480-25 is the part number for the coupler, probably changed, any of the usual suspects should have it. Ask for the "tab coupler", has a tab sticking out the side. You can do them all at once, or one now, two next time, two next time....does an adaptor car first, then a full car, full car, until you're done. There is even a way to do it with Box couplers, which I bhave done, and still have on my railroad.
Sam