Trying to separate intake and exhaust manifold before assembly, '54 Chevy 235. 2 bolts on bottom of exhaust are bigger than 1/2" but smaller than 9/16". Cleaned up w/ wire wheel on drill, tried file
that I use to sharpen mower blades and won't even scratch it. OK - split the diff, look for 17/32 socket - no one stocks it. Anyone know what size they are?
