Back in the 1970's I don't remember any mention of welded frame connectors. Back then I had the popular bolt-in version on my '65 Valiant bracket racer. Over 200 drag runs and cruising downtown on the weekends. Don't remember any noises, failures, or problems. Sorry, don't have any photos of them. There was a company called "For 340's Only" that may or may not have been selling 'em during those times.
View attachment 1715558534
