Well like I said what I know about converters pertains to 4th gens but the quality brands are Yank, Vigilante and Circle D. I remember a discussion here once about converters and specifically TCI converters, and I think someone made the point that their SBC stuff is different.
Found the thread I was referring to:
http://www.northeastf-bodyassn.com/s...ead.php?t=2234