Michel
You'd be surprised about the futaba servos, go to
http://www.futaba-rc.com/servos/futm0029.html, They
position with a very high degree of accuracy, can generate up to
194 ounce/inches of torque and are designed for hostile enviroments. (RC Cars and Helicopters). I've bought a couple of
pumps on Ebay and was going to gut the control portion, Ill then
design somewhere to mount the servo
A std servo with the linear converter generates 1.5Kg of force,
with a high power one that would be over 6Kg. The should be very little force required to move the rack, its only twisting the
pistons of the pump
Best part, the servo costs about $24USD with the linear converter.
If you go full EFI you lose all the MFI advantages. As for
measuring the manifold vacuum, Its already there, tap into the
vacuum advance pipe to the distrubutor.
Neven