I recently ran into an issue of having a BBC on SBC motor mounts in my car (68 Impala)....needing to modify the oil pan to clear the centerlink. Then I have a Short water pump, with brackets from a Long water pump truck setup. So the problem was the short water pump does not have the bolt holes for a passenger mounted alternator. I could have sourced and bought the Drivers side mounted brackets for the 396-427 cars. But I thought that loaded up the drivers side and made the whole system look a bit off. So I made a custom Bracket to mount my alternator based on some aftermarket brackets available for the drivers side or high mount passenger side. This is what I came up with....Only two bolts and its surprisingly solid. Feel free to comment or critique, I free handed the arc with a torch and ground down the rough parts. I think with some final touches it will look and function good.