Back Up Light Switch Engagement Conundrum

If you mean weld a blob on the switch, I don't think thats a good idea.

No, I mean weld a little dot on the back of the reverse lever arm itself, not the switch ball.

If all else fails call the 4 speed tranny specialist's at Brewer's Performance.

Believe me, Brewer's was the first call I made, but they were as baffled by the whole thing as I am.