As for thick TBs, such as my 1.24s, I don't think anyone currently offers them that I'm aware of... maybe Firm Feel would make them? I bought mine from California Suspension (later called California Moparts) back around 1986... and had progressed up to them from smaller TBs. I think I've seen 1.22 recently offered/advertised within the last cpl years somewhere... can't recall from where. due to the hex size at 1.25", the 1.24" are the thickest that can fit on most cars (A,B,E bodies for sure; C bodies I think have larger openings).

Mopar Mitch "Road racers and autocrossers go in deeper and come out harder!"... and rain never stops us from having fun with our cars... in fact, it makes us better drivers! Check out MOPAR ACTION MAGAZINE, August 2006 issue for feature article and specs on my autocross T/A!