[b-man]

Pulley alignment would be an issue, the crankshaft balancers changed in 1968 pushing the bottom pulley forward.

Unfortunately throughout the years the accessory drives were redesigned a few times, you can mix and match some of the parts but it’s kind of a trial and error thing.

The best way would be to use the accessories off of the later 400 or 455.

No matter what adding a roots blower belt drive into the mix is going to be far from a bolt in deal, I really wouldn’t expect everything being kept in the stock location when it comes to the power steering, A/C compressor and alternator. You’ll have to get the blower drive in place first and work around it.