Bigred,
The way I see it you have three options:
1) Leave it be. Chances are nothing will ever happen to your turbo to cause it to overboost, usually if a turbo/wastegate gets flakey it will not produce enough boost.
2) Find a valve in a boneyard, figure out how its wired and intall it.
3) Install a boost gauge so you can monitor what the turbo is doing. I like the 15psi version of this one: http://www.dieselpage.com/issev2.htm
RT

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