Iv'e wondered if there is a chance I could take off the ac compressor and just run a belt around to the crankshaft pulley,but I think there's a bolt that needs to be removed,not sure so my ac is going to remain on the motor.The Eaglepedia should have the vacuum diagrams your'e looking for,they changed a bit over the years and with different equipment too I imagine,I have a few on mine though its been changed to injection.The 88 I own has a ton of vacuum lines all over it so I'm not messing with anything (some are controlled by temp then open up like on your air cleaner).