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If you use the remote-starting test lead near the strut-tower (The pink-lead near the Left-side strut-tower on my 85 740), you wont need to use the ignition-key to turn the engine, meaning you wont need to disable the fuel-pumps as they are not powered during the test. This also allows you to check compression via a hand-held gauge without a helper.
Unplug the ignition-to-distributor ignition wire. Removing all spark-plugs prior to checking compression helps reduce the load on your starter during testing, leading to higher engine rpms.
You might find more info from my recent compression testing thread.
Noel
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