if it spins round and round,and the bolt is fine, goto parts store with your bolt,have em look 4 next size/halfsize(sometimes they got the oddballs) get a drill and tap to match. drill hole run tap thread in new bolt.or buy helicoil kit for current size. still have to drill and tap.you can do either repair without removing the manifold, and if you have the drill bit, its gonna cost like 10-12 bucks.either is easy but you may have to find a right angle drill or an air drill.kinda tight in there.you know someone with a right angle drill, you know the fancy flip drill type thing or maybe a more expensive one. a small skill may work, but a small air would almost definately fit, if not find the right angle and hope thats the only one. if the bolt just dont start get a tap(thread chaser) and hope it holds.i think those are supposed to be hard bolts as well.
