Random Questions

[trailcarnage]

I am getting ready to order my suspension and brakes for my 1970 LWB but have a couple of questions:

1) I plan to bag the rear suspension. My question is whether I should be running 2600 of 2500 bags. I don't plan on carrying anything heavier than a motorcycle so would it make sense to go with the 2500 so that it is not as soft?

2) Is it possible to use an automotive OEM air suspension pump (Cadillac, Range Rover, etc...) to charge airbags? I am not looking for something super fast, just working on a budget.

3) My current brake system is power drums up front. I have read that you should change the booster/master cylinder out when converting to disk brakes up front? Why is this the case? Master cylinder capacity? If so, does the booster also need to be changed or can I get away with a disk master only?

Thanks in advance!