I've put an 86ish middle seat and tracks into my '82 diesel Westy.

The longer rear track went in no problem, but the shorter front track
was missing a welded nut for the middle hole, and the two end bolts by
the sliding door appear to be WELDED? on to support the propane tank.

This means the front track has just the inside two bolts connected, and
is propped up on top of the two outer welded propane bolts.

I'm considering taking a hole-saw to the track so it fits flush around
the propane bolts, and then just adding a nut and bolt to hold that end
down.

It all works fine, just doesn't sit flush, and isn't fully secure (but
still pretty solid).

Is there something I'm missing here?  How do others deal with the
propane bolts?

Will in Alaska.