Vintage Tandem Gitane, Weight load and tire advice?
I have been waiting to find a vintage tandem for a while to use for an up coming family-charity ride (and general family fun), and happily picked up this vintage Gitane on local craigslist. It obviously needs some TLC and a long way to go before back out on the street; I don't care what it's worth since it will now never leave my family ownership, so I didn't put this inquiry/appraisal thread. I am seeking advice/experience with a reasonable weight load to expect with it? In reading through past threads, I've read some about flex and weight load concerns with these (though I don't think this is the model of concern since it has the supports from the head tube). I'd ideally like to have two smaller to medium build men on it-- say 300-320 total lbs. Wondering if anyone has experience with these or other vintage tandems to comment? Also, advice on tires and/or replacing the wheels to help be able to carry that load? Some seemed to recommend 40 spoke wheels, this doesn't have them.
I'd greatly appreciate any advice or expertise on this (or any other tandem concerns I should have, since I am new to these). Thanks!