Sure looks like the Grand Prix from the 1976 catalog on retroraleighs.com but in blue/black:

http://retroraleighs.com/catalogs/19...rand-prix.html

Someone upgraded the shift levers to Weimann levers and Carlton hoods, but otherwise seems the same.

In terms of 700c wheels, that would help lighten things considerably as it looks like the existing wheels are steel and you'd be switching to aluminum alloy. Your rear brake looks like it has the reach to do the job (an additional 4mm), but the front would have to be switched to a Dia Compe 750 rather than a Dia Compe 610. Those pop up on eBay with great frequency.

Neal