Freewheel compatibility...
 

Another forum member is seeking a five speed freewheel (14-32) and would like to know if a Shimano 600 five cog freewheel will replace a Suntour five cog, without needing to respace the hub?

I believe this is an easy swap, but I would like to know for sure.

Thanks.

Yes, provided they are both the same thread (99.9% chance they are both English). You may need to make some minor derailleur adjustments.