Sorry to be a gloom and doom merchant but what you are describing is a classic car club. Years ago, a decision was made to turn it into a social club instead (and quite a cliquey one at that) and people moved away from here to Facebook and dropped their membership. The club funds were directed towards a series of loss-making Weekender extravaganzas so that now there is hardly a pot to piss in.
I believe, though I cannot prove, that the servers that underpin the forum would disappear if it wasn't for the generosity of Jim and Co.
If people use the Facebook pages to direct people to interesting content on the forum, footfall (and even membership) could increase but it would still be a long way from being a thriving classic car club IMO.