Frame Connectors - install question

I answered one of my questions via searching and reading. Installing these appears to be one of the last things to add on a build so I will wait till I get all the running gear back in it.

In the meantime, I want to move the emergency brake cable and add the return line for the fuel tank. That brings us to fitment questions so I know where to put these.

I was having a hard time getting these to fit, but I think it's because all the rear running gear is out of the car at the moment.

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When I test fit the connectors, I can get them to fit nicely on one end or the other, but not both. Here is the problem, the rear frame pocket fits nicely but the torsion bar end either barely make contact or doesn't make contact at all.

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I think the car is currently sagging, because it touches the front edge of the rear seat floorpan. This situation is the same on either bar installed on either side.

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A couple of questions. I will put off installing these until I'm done with the rest of the car, but shouldn't these fit with space between the top of the connector and the floorpan? If so, how much room should there be?

The next stupid question is, these are clearly made for right or left side, but there are no markings and I got no instructions with them. Does anyone know which one is for which side? There is about 1/2" of offset on the rear frame rail ends that would put the connector further inboard or outboard depending on which side it was installed on. I tried it both ways and didn't see anything that makes sense.

I tried calling to see about install instructions and spent 2.5 hours on hold before I gave up. Any help greatly appreciated.

With these cars being built by hand on assembly lines 50 years ago theres always variation from car to car. Sometimes up to 1/8" in dimensional differences from car to car. With subframe connectors it's really better making them yourself to fit exactly to your cars chassis and then weld them in. That's not to say you cant make em fit. You can cut, grind modify anything to suit.