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@BandMominMO. I had saved slick94prix's 45 minute alternator swap instructions back in 2005. See the PDF below. It has the photos that @94 olds vert noted are missing. There is another write-up of how to change the 3.4 DOHC alternator floating around the web from the mid 2000's. I had made a copy of that back then and it is linked below, too. NOTE: I searched and that second write up is still on the web. Surprising, but nice to know the info is still accessible, since the 3.4 DOHC was last produced in 1997. Slick94prix's 45 minute 3.4 DOHC alternator repair- Write Up Another web page capture of 3.4 DOHC alternator replacement instructions W-Body Admins - if posting this content is against forum policy, just remove the offending material or the entire post - thanks. 34 dohc 45 minute alternator..pdf

Hmmm.......lucky you to have the 97 cam carriers. Did some searching for you....seems that back in 96 some engineer at GM decided that the cam carriers needed a revise for the 97 engine. From 91 thru 96 the lifters are the same item GM 17108288 or Manley ML139H, Enginetech L3400, Melling JB-2275 all of which are no longer available. But the lifters for the 97 are available. How badly pitted are your present lifters & how many of them are marred? If you can't find any new lifters how do you feel about exchanging the 93 cam carriers for the 97 cam carriers? The only other change made to the carrier casting was for the 94 model year introduction where a cam sensor port was added to the machining process that located that sensor right above the intake cam just to the right of the revised carrier cover on the front bank (there's a notch in the cover at the right upper corner).

If you're uncertain on which lifter to purchase then remove one of the cams & pull out a single lifter & take a measurement with a vernier to remove all doubt as to what the lifters dia are. To the best of my knowledge the early lifters (2nd design) are 1.298" dia or 32.969mm & the 96-97 lifters are 1.2992 or 33mm dia. That is a difference of .002 thou.

The only difference in the early lifters & the later lifters is the overall diameter. The early lifters are 32.969mm & the later are 33mm. Pick up a single lifter designated for the 96-97 LQ1 engine & see if it drops into the lifter bore freely. In terms of dimensions the difference between 33mm & 32.969mm is the equivalent of approx .002 thou.

Photos? Is the water damage on the lifter face where it rides against the cam lobe, or internal?