Alternator bracket mounting - not right

[kellytheaker]

I have a 72 350 - the previous owner felt the stock mounting brackets and adjusting arm had to be thrown out and chrome junk should be installed - now i want it back stock , i thought i had a short waterpump but when i installed the bracket and arm the 1" of adjustment is not right - the alt hits the junk chrome valve covers so i am starting to suspect i have a long waterpump , dimentions from the block mounting is 3" to pulley and 6" from mounting to pump snout where the fan spacer starts , am i on the right track here . I would be very open to the 2 mounting styles but this isnt working .