Wouldn't worry about the weight issue, I'm 55 and have large bones too, did my PPL (and medical obviously) this year with no probs although where I learned the training is all 4 seaters anyway. The only drawback to being impressively built is that some a/c can get a bit close to the limit balance wise with two up in the front and full fuel, usually PA28's.
The best advice I've had is always to break your biscuits in two before you eat them as all the calories fall out.