Question for an LE owner? Early or late 2.0 plenum on LEs?, which intake/crank case vent system to use? Options

[JamesM]

Re assembling a 74 LE Bee from a pile of parts and found the that intake plenum that I got with its original motor is the later style that doesn't use the "F" vacuum connector/has no port of the crank case vent.

My instinct is telling me that this is the wrong part, but i wanted to confirm with another LE owner as to the intake plenum/ crank case vent system used on their LEs. Having noticed other differences between the LE and my earlier 74 car I just want to be absolutely sure before I go and prep another plenum to install.

[914Sixer]

70-74 uses a single pole switch.

[JamesM]

70-74 uses a single pole switch.

Correct. I have no idea why the early manifold I have here had the dual pole on it, was sitting in my parts pile this way.

When putting this motor back together though and testing the single pole switch I wound up installing, it really got me to questioning how well these single poles on the 2.0s actually work in practice. The 1.7s mounted the single pole switch in a separate unpainted bracket, on the 2.0s they mount in the painted manifold. Given the single pole switches need to ground through the switch body and then through the engine case if the paint isnt removed from appropriate surfaces it will never ground/activate. I noticed this on the late style manifold I got with the motor that had been "restored" and never would have worked as it was painted everywhere (Though i never start 914s in the sub freezing temperatures needed to activate the switch anyways)