Tell me how strong was or is you 7 1/4 rear.

my 7 1/4" withstood about 3 months of daily driving and weekend abuse behind a 250hp 360 before it went bang. it was the spider gears that went. however, upon later removal of the trans, i found that the snout of the torque converter was cracked in two places!!! front to back!!! so make sure if you break anything in the rear end that you check out other elements of the driveline to be safe unless you are absolutely sure your parts are bulletproof. i made 6 dyno pulls to 5000+ rpm on that converter, that really could have been a disaster - think flying shrapnel and missing body parts. i'm thankful to be so lucky that nothing happened.
-tim