the Ushape 7" mount pictured is the correct one for the boss
on the exhaust manifold, the front and back ears on the gen bolt to it for correct positioning, depends on the length of the gen whether between or outside, and which of the 3 holes on the bracket are used - I've seen them with the ears separately bolted [most] and a couple with one long bolt front to back with a ferrule [light tube] between
the holes in the front of the head are for accessory mounting on later models, the adjuster arm on the earlier engines came off the water pump mount bolt - the adjustment bracket pictured [the long one] is close to correct and should work, there were a number of possibilities depending on year and specific generator - I have
one with more 'hook' I added cuz that's what worked with the alternator - the bolt on the water pump was originally an odd type that was a bolt with a threaded bit extending above the head that an additional nut went on, so the water pump mounting was undisturbed when the gen adjuster was moved - same thing as a stud with 2 nuts if you can't find the correct one, but it could also be mounted just under the [longer] water pump bolt, which would have to be loosened a twitch when the angle of the bracket changes with adjustment - the bracket can be in front or behind the top ear on the gen
also, if you get the casting number from the bell house flange on back of the driver side of the block it will tell you if it's a 283 or 327 and the possible year range
Bill
