rear end problem

[1980convertible]

Hey guys I have a 7.75 inch rear end with 3:45 in my 1979....I am currently rebuilding the engine....upgrades as it stands are basic and include...4 barrel intake and Edelbrock 600 carb, Competition Cam setup with an E303 I think, a 42 psi edelbrock fuel pump, Fllow master headers and H-pipe...under drive pullies and a new alt are coming...I know this doesn't sound all that wonderful compared to some of your setups but I was wondering if my 3:45 will hold up to whatever power the engine puts out?