Paul,

If your chrome Voyageur is a 1980 or 1981 Voyageur 11.8, it has 27 x 1-1/4-inch Araya alloy rims, and the rear wheel freewheel is a Shimano Altus 6-speed cassette 13-15-17-20-24-28. If the seventies Paramount you're thinking about acquiring is a P13-9 Professional Road Racing model and was set up for 27" clinchers, the wheels from your Voyageur should work fine as long as the rear derailleur and shifter have enough range to accommodate the six cogs on the Voyageur cassette (the Paramounts have five cog freewheels).

If the Paramount is set up for tubulars, the radius of the rims is 4mm less than the 27" clincher rims, so the brake pads will have to be adjusted 4mm higher for the 27" rims on the Voyageur wheels. Also, there will have to be rear brake bridge and front fork crown clearance for the larger Voyageur wheels. These may or may not be problems.

What year and model is the Paramount?