Found this on youtube, it might help out.
does anyone have a detailed vacuum hose diagram of the 20v blacktop swap?
there used to be some good ones but some can't be accessed any more.
for the hose that goes to the VSS solenoid (evap), if there is no VSS solenoid (Haltech ECU), then what should be done with it?
Here is a good site for working out vacuum lines, but its for silvertop....
I'm not to sure exactly.
My method was to delete ISV, EVAP and blank off fuel pulse dampener.
Basically romoved the entire rats net from underneath the Quads.
I am of course using an aftermarket ECU
This is also what I did on my last Silvertop motor also running stand alone ECU.
Below is a simplified diagram of what goes where.
Perhaps you could block off the evap lines? or maybe loop them?