Clean sheet front suspension design help

[ONROADYNO]

I am planning to make a front chassis with C6 uprights and control arms for a 1971 - 74 Australian GM car. 60" track.
The chassis is very similar to the same year Chevelle.

I would just like to check if my mental process is correct.

1: Find out what is the factory offset is for rims (C6).
2: Place rim/tire in desired location
3: Bolt up hub and control arms
4: Make bottom control arms parallel to the ground
5: Position top arm for correct camber gain... ( how do I do this please )
6: Make mounting points for suspension and chassis rails (as wide as possible)

Thankyou