ok i am going to build a 73 240z with o 406ci small block chey im thinkin is gonna makearound 400hp to 425hp but eventually i am gonna ad 150hp shot of nitrous to it and i was wondering if the sotck rear end would hold up to the 400hp for a few months untill i get enough money to buy a ford 9"

thanks for the help

It should be OK provided you don't hammer it constantly. The u-joints are typically the weak links.

it'll hold if you are gentle with 1st and 2nd gears. no hard launches and beleive me you will be tempted

edit: btw welcome