I have a 1974 C10 stepside. After re-installing the power steering pump I discovered that it is leaking around the reservoir. I am replacing the pump rather than a seal kit. the difference is like 40 dollars which is money well spent if you factor in the risk of my work leaking again... The pulley on the pump is a 2 slot pulley, one belt runs around the AC compressor. My question..is it better to tighten the AC compressor first or the Power Steering pump first? Thanks for any experience.