Jim,
I've done the same as Capecodder. On my Schwinn Tandem I'm running a Suntour 6 speed ultra using barend shifters, with no problems. IIRC, I'm using Nashbar 8 speed chains which are KMC. I ordered 3 and spliced two together for the timing chain.
Let me know if you need help building the freewheel with the range you desire.
__________________
Bob
Enjoying the GA coast all year long!
Thanks for visiting my website:
www.freewheelspa.com