drossall wrote:I'd want to see whether I could keep it going. Sounds a nice bike.
you'd normally expect a Shimano rear wheel to take a Shimano cassette, and I'm not totally clear whether you can get a Campagnolo freehub for a Shimano rear wheel. If that's what you have, and if it's a Campagnolo cassette, no problem. If they don't match, it will show up as gears slipping however much they are adjusted.
You can get campag spacers for shimano sprockets, 9 speed cassettes (era of the bike in question) are more frequently found with the through bolts and thus spacers are all seperate. I run my early 90s team replica Gitane with Campagnolo but use a Shimano cassette with campag spacers on the cassette so it's not that difficult.
That said I've seen more Campag wheels with Shimano freehubs than the other way around.
But I agree, ride the bike and maybe get used to its quirks, raise the stem a bit and bring the saddle forward and that might alleviate the feeling of being too far forward. If the OP still doesn't feel right after a few weeks/months it's hardly going to reduce the value of the parts.
I wouldn't scrap the frame anyhow, everything has a value, even one that isn't perfect and I have a pair of Time Composite forks on my Gitane that are still going just fine, there's some value in those 1" forks particularly if the steerer is fairly long.