How fast have you been with a th350 (1/4 mile) or how much power is yours holding?

Who built it? what mods?
I am not debating whether a th400 is stronger (I know this). I am just curious about breaking points in the real world. I have already contacted Coan, Art Carr, and visited JW in person to get there ideas and see what they could do.
The reason I ask- my recent GM high tech has several cars in the 9's with a built th350. Also this would better fit my current set-up (current torque arm and crossmember and custom driveshaft). I run 10's now on street tires and 700r4.

Thanks
Matt

 

My dad had one behind his bigblock and it was running low 12s. The trany was completly stock, dident even have a shift kit in it. He never had a problem.

I on the other hand have never driven my car because everytime i find a problem with my th350 and fix it another one comes up.

 

14.4@95,
yup it's fast
it's the only tranny i had when i put the car together.

 

Mine's done 5 12.6's a 12.7 and a 12.8, plus probably 20 14.0 and 13.9 passes (off spray). I've never changed the fluild from the day it was built and it still looks perfect and doesn't smell burnt. All I put in it was a hardened intermediate sprag race, the high performance rebuild kit with Alto Red clutches and the Kevlar band, and a Trans GO shift kit. I swear by that Trans Go kit, it gets the car into gear amazingly fast without a ton of shock to the tires (my 9.5in 3000rpm converter helps that shock out alot as well). I've heard that with the replacement sprag they can take unreal ammounts of power, the only thing I would be concerned with at that point is breaking off the bell housing which I've personally done before in a different vehicle. My mechanic only runs TH350's in his alcohol fed Buick and was talking about getting a case machined to take a detachable bell housing so that may also be an option.