I first noticed the long 20" bicycles in the 60's. I was a gangly teenager and just a bit big for these bikes. However I really liked the style of them. Someone went the extra mile with a welder trying to save this frame. Looks like you did a good job repairing the "repair".
Welcome to the Stroker club @1966Jerry. Fine work thus far Your thread is linked to Pinterest where I discovered it.
The original was a Rollfast Stroker. Well designed. I've put thousands of miles on a frame.
Modded 1968 Hawthorne Formula V twin bar. Strokers came in 2 and 3 bar. I've fitted a 75 tooth comfortably.