140 Chassis Instrument Lamps

[rchase]

I have an idea how to change the lamps behind the main instrument cluster and know it involves removing a vent, swearing and some voodoo curses. Several of my lights for vent settings on the upper dash have gone out. Has anyone replaced any of these?

Additionally has anyone tried yellow LED's for the lighting behind the main instrument cluster on a 140? I have heard of people doing it on the 220 to replace the defective cold cathode lamps. For the hassle and risk of damaging wood parts I would rather just replace a few bulbs with LED's that will never burn out.