daveinfuleffect

I have an 80's Cinelli 6 speed bike and I want to put on a new wheelset to change from Tubular to Clincher but being a bit of a novice with tech stuff I have some questions, maybe someone out there can help. The rear spacing is 127mm, can I still use a new 130mm wheelset and just force it in a bit? Also, the original gears are thread on freewheel but all the new wheelsets are cassette type compatible, how do I find a modern six speed cassette to fit the modern wheelset? Or can I get a 9 speed cassette and just use 6 cogs? Any info would help.... Thanks!!