as for the TB wiring, using a different TB will require a rewire to make it work. the 2.2 and 2.4 TB are interchangeable (the wires use different colors though, so thy appear to not be interchangeable). I have wiring diagrams of the LSJ TB if you want them.

 

Isnt the PCV in the valve cover and it recirculates to the air intake?

Atleast thats the way it has been in every other engine I have worked on..

Almost every aftermarket intake manifold for any V8 has that EGR port blocked off on the head. I dont see the issue on a four banger?

 

There is no "PCV checkvalve" like the engines had in your description above.

On the ECOTEC the engine sucks in air at idle and slow speed through a calibrated hole in the manifold -- filtered air is sucked into the Valve Cover from the VC tube at this time.

Under load or high speed the flow is somewhat reversed -- air is sucked into the intake tube from the valve cover hose at the same time the intake is still sucking crankcase air in (crankcase pressure is higher then).

that help?

 

It does, thanks for that info!

It does look like you could do some work to the 2.4 intake to clear the port in the head and tap a port in the intake manifold itself to make it work.