I cant say as i have a set of these, but all the reports i have had on these is that they are top notch, and they look extremely well engineered and welded.

I know the company owner personally, have raced with him at several Classic events and he is a super nice and very knowledgable guy.
This setup is on his 9.50 ish 65/66 yellow dart that he races extensively.

Having seen the parts( and their quality) and knowing the nature of the guy who builds them, i would have zero problems stating i would buy and enjoy having his setup in a heartbeat.

I also doubt such a big a Mopar community vendor as Mancini would sell his stuff if they had had issues with these reported to them by the many customers running them...