I've had good luck just cleaning the valve, but when you take it out on higher mileage rigs, the grommet in the cover will hassle you (brittle). With long needle nose pliers, it can be done with a little patience.
I wouldn't change sides on the valve, but hey, give it a try & report back <img src="/forums/images/graemlins/notooth.gif" alt="" />

Sid, you can't get to the bolts on the pass cover, nor slide the cover out from under the plenum, without remvoing the plenum, makes tuff work outta a simple task.

Toy4x
90 ExCab SR5 V6 Auto In need
99 Taco samesame(ish)