Antifreeze leak on header flange

Well, I hope not. Heads on it are stock iron 906 heads and the car hasn't been hot. Leak just showed up and it hasn't been driven since last fall (so it hasn't been overheated).

Trying to decide if I should throw a can of Bars Leak in it, or tear it down to see what's leaking and fix it. I hate dumping stuff like that into it when it should just be fixed. Don't get my wrong,... I've used it before on beaters when I didn't feel like messing with them, but hate to do it on this. Problem is, with the studs in it, I looked at it and don't know if I can squeeze the header out between the ends of the studs and the fenderwell.