Wrong section of the forum dude unless you fancy showing us some pics if your vintage cars?
Anyway, yes you can race them they should get you started again! The only problem is spares really.
Your best bet is to sell them off or keep them for old times sake?! Vintage cars have quite a following and you could raise some cash?
Get yourself down to your local club, visit
www.brca.org and see what's popular
you can't go wrong with a B4 or X6 for 2wd, or a B44,Cat Sx, B Max etc for 4wd. There isn't any really bad cars to avoid but get yourself to a meeting and have a chat with some local racers.