1973 Ford 460 rebuild, do the transmission and rear end need to be upgraded?

[AmmerNaber]

Thanks to the posters on this forum, I am rebuilding my 429 in my 1973 Country Squire to a 460 with around 450 horsepower. Do I need to change or upgrade the stock automatic transmission, torque converter and or rear end to accommodate the new build? Or will my stock automatic transmission and rear end be ok? Also, how do I determine what is in there right now? Thanks.