I used a Bouchillon pulley set-up for my 440-6 with Shaker hood to mount my Sanden compressor under my alternator, although I ended up using a different belt routing to allow for more belt-wrap around some of the pulleys.

https://www.bouchillonperformance.com/products-aircon-compressor-brackets

1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)