5-speed transmission into S

[The Radium King]

hi. looking into what's required to put a 5-speed transmission into an S car. the big question for me is axles:

- the orignal 6-speed axles are too long, correct?
- the 5-speed axles won't work with the S hubs without a bunch of work (non-S bearings and hubs, etc.) correct?
- 987 axles will work with the S hubs and are shorter, but would require S transmission flanges in the 5-speed. Anyone know the length of a 987 axle (5- or 6-speed) vs a 986 5-speed axle?
- any other suggestions?

Thanks for any help.