Thanks for all the replies. I now have an A.D.D.-defeated T-100. My friend, who owns an import vehicle shop, devised an alternate method of locking the shift fork without using the clamp method described in the 4x4wire article.
He explained that there was an inspection port on the axle tube with a bolt in the center of the cover. He said the shift fork had a hole or detent that this bolt aligned with when the fork was slid-over into the locked position. He fabricated a longer bolt with an extended conical tip that now holds the fork in the proper position. He marked the axle tube "Locked" and removed the now unnecessary vacuum lines. He thought it was a more robust method of insuring nothing every moved or became loose.
On a side note, the failure this time was actually an electrical relay that controlled the vacuum portion of the A.D.D. system but I was tired of this overall issue and am now happy to have everything simplified. It rained here this AM so I decided to try out the 4WD operation. The trasfercase engages with zero effort and the occasional grind I got when engaging 4H from 2L is now absent.
Thanks again for your assistance. Brew <img src="/forums/images/graemlins/cheers.gif" alt="" />