I'm running a '73 F.5 bored .40 over and 6 into 1 header with a 32/36 Weber. I ordered a high altitude jetting kit from Redline (701 DGV6) and here are the #'s I ended up running. I live at 4000' but regularly drive to sea level and 4 wheel up to 10,000'.
The pictures show 2 of the jets you'll need to play with, but you'll also need to adjust/swap the main jets (in the bowl) and the air corrector jets that are between the bowl and venturis. You'll have to remove the choke lever (small C clip) and the top plate of the carb (6 or 8 screws, can't remember). I suggest ordering a rebuild kit at the same time.
The Idle Jets (pictures 1 and 2) are broken up into Primary (engine side) and Secondary (steering column side). Pic #1 is the Secondary Idle Jet, #2 the Primary Idle Jet. All the jets are referred to in the same manner.
I ended up running a 90 Primary Idle Jet, 70 Secondary Idle Jet; Air Corrector Jets 150 Primary, 170 Secondary; and Main Jets of 140 Primary, 175 Secondary.
I made a chart listing all of the jets and tried to only make one jet change at a time. On each chart I kept notes on how well the engine performed at low speed, high rpm, lugging etc. I drove the same course each time that involved highway, hills etc. You'll start to see trends after awhile, and see how changes affect each other.