Autopulse Fuel Pump on Chevy 216

[Lynn Eades]

Owen you wont damage the pump, but you can overcome the needle valve in the carb. The Ford v8 fuel delivery pressure should be about 3 pound max (cant remember exactly) (Chev, I don't know the figure) Delivery pressure is dictated by the spring under the diaphragm. The mechanical pump is a problem unless it has a known to be good with modern fuel, diaphragm. The high aromatic fuel of today eats the old material which may still function, but can develop holes which let fuel into the sump. This can lead to oil dilution and running bearings.
A regulated (separate fuel pressure regulator) electric pump is a very good option. The worst it can do, is not work.