Times quoted are on my back in the garage:

Subframe connectors I did by myself in 4 hours (Auto Rust Technicians, installed before Hotchkis released their kit).
I did the front end by myself in about 15hours.
I did the rear end with a friend in about 4 hours. Cleaning and mocking up the sway bar mounts for welding took up most of the time.

1971 Challenger