Amplifer should give the following signal to the modulator (engine off, of course, unless you want hook the mitvac up while driving):

At closed throttle, 15-17" vac. No kickdown to second on this car, so vac should drop as throttle is opened until near or at atmospheric pressure (0" vac) at full throttle.

you will have to supply appropriate vac with a pump of some sort (not too big, naturally!) or drive the car with the mitivac "t"-ed into the modulator line.

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!