2 Point Seatbelt Placement.

I hated the three point belts and they were even more dangerous because the belt should route to a point above your shoulder. In an accident they could compress your spine.

After having the 2-pounts installed, I rolled through a seat belt enforcement zone and the officer approached my car and was fine with the 2-points.

In Michigan, cars built before 1965 don't require seat belts, however, my car was built in 2010, although it replicates a 1958.

I'm content with the 2-points :-)
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I replaced my three point with Simpson lap belt using the existing mounting points. Don't know if a Beck is different but it just worked. Here is a link to my thread on the same topic. Hope it helps. 

https://www.speedsterowners.com...225#3684268504954225

Yeah, I would think that if you HAD a 3-point harness and are now going just to the lap belt, the existing mounting points should work just fine.  No points for authenticity here.....  The originals only had belts for racing.   (and Steve McQueen only buckled up back then when the bad guys were chasing him.)

no help here Terry, but I love your term: "plastic potato"...

 

For what it's worth, Terry, here's how VS does it:

And here's where the bolts come out under the pan:

It looks like they're as far back as possible on the horizontal part of the seat well. It looks like a better place might be higher up on the vertical part of the seat well, but maybe not.

Where they are, the bolts (and thin sheet metal of the pan) are stressed in shear as the belts come under load, which might be more secure than on the vertical part of the seat well.

Of course this is a VS, so the decision of where to mount them probably got made based on the simplest, cheapest way to do it.

 

This is not strong enough and could,  pull especially at the pan weld joint. I would use a 3/16 or 1/4" x  3"W x 12"L  plate long enough to capture both belt bolts so that the load is shared.

On my CMC I have one going to a threaded plate attached to the inside of the tunnel where two layers of tunnel metal overlap. The other is mounted through the steel tube frame under the door opening.