I too run a triple black six pack and aftermarket A/C. I used the Bouchillon under alternator bracket, but modified it to change the belt paths to gain more belt wrap around the pulleys.

The new routing uses one belt from the crank to the A/C compressor, and a separate belt from the A/C compressor to the beefed up CS140 alternator. My power steering belt goes from the crank to the water pump and then to the power steering pump.

Most people never know it has A/C while looking under the hood.

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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)