I am running into the same problem with my 72 402BB. I just installed a Edelbrock 7562 Intake with a Edelbrock 1412 Carb. My waterpump is a SWP(short stem). The alternator bracket was customized to allow for the original intake and now it will not fit the new intake. I ended up at my local autoparts store and picked up a universal bracket. It is basically a single flat rod(arched at slot end) with a hole at one end and a slot at the other for adjustments. The alternator is also mounted at the bottom. I am still working on the engine so cannot test it. But will let you know when I get it up and running. I screwed up and forgot to mark the distributor when I removed it, that is what I get for being in a hurry. I can take a picture of the bracket if you want.
