link pin front end and rim mounting

[flat]

What are the options if you want to mount aftermarket rims to a likn pin (LP) front end (65 and earlier)? You can't just redrill the drum because of the raised boss in the centre of the drum. From what I know you can:

a) either get an aftermarket disk kit that uses 4 bolt drums and redrill them
b) get a dropped spindle that uses Ball Joint (BJ) drums (and redrill them)

Are there any other options or does the above cover it? Do BJ drums fit on a LP spindle?
Thanx for your help