That sucks about the replacement parts availability for the VA front runner stuff. Have you considered changing to the Holley Mid mount setup for the BBC? It is very similiar to the VA setup but uses more OEM style parts (cartridge style water pump) and the alternator puts out over 100 amps at idle. You also have the option to go with different finishes depending on your build. I have a couple of friends that have the SBC version and love it. I have the LS version in my car.
https://www.holley.com/products/engi...parts/20-242BK