I never had any problems with T-350's or the 8.2 bop rear. Had a minimum of 1000 drag strip runs with slicks and tons of street beatings in a 3500lb Lemans. Same with t-350's
Count your blessings.
I suppose those TH350's and 8.2's were absolutely stock, too. That reminds me of a guy who said he built a racing engine using a "557" block. It had over 500hp + a shot of nitrous. Made countless passes. He couldn't understand why so many other guys were breakin 'em at well below 500hp. Hey, some guys are just luckier than others, I suppose.
We never had any problems either, with 400 engines. I even raced my '69 4-speed GTO for 2 seasons, without problems. The problems started when a guy gave me a 455, out of a '70 GTO. It broke an 8.2, a built powerglide, the int sprag outer race on a TH350 I bought out of a running 11 sec Nova, the TCI heat treated outer race I replaced the broke one with, and the int sprag in a stock TH400, as well as the sprag in a full competition TCI TH400. Hey, when you hook a 455 to the track with big slicks, it can tear up some stuff, unless you are real lucky, or have some HD parts behind it.
Now if all you wanna do is smoke some hard street tires now and again, the stock stuff is fine.
Bottom line is, you can take your chances and run 'em til they break, or upgrade to begin with.
