How much hp/torq will an OEM 833 4sp and 8 3/4 take?

thanks to all you guys for the great advice. i can always depend upon the FABO race comminuty to "know stuff."

"back in high school" (69-72) i street raced a (then new) 68 barracuda, formula S fastback, 340 4sp, 3:91. it was an all factory drive train with the 23 spine 833 and 8 3/4 A-body rear gear. the car came with original 14" x 6" "bias belted" tires but i did up-grade to "polyglass raised white letter" 14's that were close to 8" wide. a fastback 68 barracuda tips the scales at about 3200 lbs. and i never raced with more than me (175 lbs. at the time) and a similar sized passenger. never had anything in the trunk other than the spare tire. i beat this car every weekend doing 3500 burn outs in front of the Big Boy drive-in burger joint in my town and launched about the same in street races with power shifts at 6k. i never broke the trans or the 8 3/4.

the "M-Code Cuda" that i'm building with the A12 440 will be exactly the same car as my high school racer - except it will have the 440 rather than the 340. and since the extra weight of the big block is over the "front" wheels, my guess is that this car will just smoke the tires all the time and NOT break the drive line. i'm really just building a "really fun" street car and not looking at a competitive drag racer.

A-body's have about a 3" (don't quote me on that number) narrower rear track than B-body cars do so a Dana 60 has to be narrowed by about that much to make it work in an A-body. there was one of these narrored Dana's on ebay recently (and may still be there) that the guy was asking $1100.00 for. while the A12 Roadrunner used a 4:10 in its Dana 60, i can live with a 3:91 in an 8 3/4 now that you guys think that the rear chunk will hold up.

if i have more technical questions, i'll be back "bothering" you guys... thanks again... !!