I wanted to install a serpentine belt system on my 1974 chevy 350 but I have been hearing that I need an additional hole on the passenger side below the water pump mounting holes to make this work. I do not have this hole on the block. I was going to use a system off a early 90`s gmc 1500 series truck. I really do not want to buy another block just to do this project. What are my options? Any ideas?

Thank you
farmerdick