I believe the 99 cars are mostly return-style systems and the 2000 cars are all returnless. If venom says it will work for a 99 and up, then it would have to work with both systems. Just to be sure you can call and ask them.
The return style systems have the pressure regulator on the fuel rail. If you look at an angle to the engine just below the throttle body you can see it. Yes it looks like a small version of the egr valve actuator. The other indicator should be a return fuel line. It will be coming out from the manifold by the fuel feed line and should be smaller in daimeter.
warmonger
Former owner of '99 CSVT - Silver #222/2760
356/334 wHP/TQ at 10psi on pump gas!
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'05 Volvo S40 Turbo 5 AWD with 6spd, Passion Red
'06 Mazda5 Touring, 5spd,MTX, Black