Another question. Dan said i can use my flywheel from my 02 2.7 in the 98 3.5 is that because from 02-04 the flywheels were the same and the ecu reads the ffly wheeels diffrently
And all i have to do is plug the holes from the pas side
There is a tone ring welded to the flywheel. The spacing of the holes in the tone ring changed in 2002.
Put the two flywheels side by side and you'll see that the tone ring is the only difference.
Be sure not to mix them up.
Unbolt the flywheel from the 2.7 and bolt it onto the 3.5.
On the vacum tubes: I mis-read your post. I checked it again.
I think you're talking about the vacuum line that runs along the passenger side edge of the plenum.
It goes from the SRV Valve just inside the front of the plenum, along the edge of the plenum back to the SRV Vacuum Reservoir.
The Resevoir is just above the passenger side exhaust manifold and should be connected to the two tubes in the plenum directly above it.
There is a fairly decent picture and explanation on pg 14-40 of the 1998 - 2001 FSM.
You do not need to use any vacuum lines from the 2.7.
You only need to connect the one line from the Purge Solenoid (under the windshield wiper assembly) to the top of the plenum (just in front of the throttle body)