Nope...stock transmission can take more...or less. People kill these transmissions on N/A cars...with what, 170ish wheel horse?
Don't drive like an idiot...you'll be fine. For your setup though...I would recommend at least a shift kit, pan drop, new fluid/filter at the time of the cam swap. I ran a bone stock transmission...with 305 w M/T ET's at the track hammering it off the stall and it just grabbin and goin. Sub 1.9 60's all night. Massive burnouts to heat up the slicks as well. I wasn't nice to it at all...and it held up just fine. Only thing I ever did break in it...was shred the HD diff...and just tossed in another one while doing a pan drop to get some of the metal shavings out. I had XP/Headers/3.25"/LS1 TB/Tune...and a bunch of other junk.
