502 mag mpi question
 

Hope to get someone to verify, but from memory (was 502 VST but converted to cool fuel)

Vacuum line from plenum to Tee fitting, then goes to IAC and Regulator on front of rail

I can look at mine in the morning & post up the info. All 3 of mine are completely stock and unmolested so they should be correct.

Sorry I didn't get to it today, had a root canal done & thought I would be fine to head out to the shop & look at it for you. Pain killers & sleep won out. Lol. I'll look at it in the morning.

Mine are 1995 502 magnum EFI motors. If you are talking about the clear vac lines, they attach as follows.
Just under the front edge of the intake manifold is a nipple, that goes into a tee immediately, one goes from the tee to the nipple on the mechanical fuel pump, the other nipple on the tee goes to a fitting on the top of the fuel injection pump which is on the top rear corner of the motor. All three of mine are the same way so I assume they should be correct.
Hope this helps out.

The clear lines are tygon tubing and used if the vst or mech fuel pump start leaking.

It was my understanding the OP was talking about the vacuum lines (small black) that go to regulator and IAC, but been wrong many times before