[95wagon]

You might want to do a little google on O2 sensor placement.
Those are inviting condensation - moisture damage .
You could also bend that linkage frame bracket , and shorten the shaft so it can't touch the frame rail. Might be an illusion but it looks pretty close.
Of coarse , just my opinion

 

[95wagon]

As above.
The one and only 376-525 I have "met" personally was on the dyno here ( rental just watching)
It sounded really cool and was somewhat lack luster in performance.
The calibration in the matching GMPP E67 controller was a bit of a joke.
There were "glitches " in tables that were in my calibration 10 years prior.
Also, If you did go E67 , you likely will have a little uphill battle with Cruise and AC control.

 

[95wagon]

I was hopeful that I could re-use my Dennys driveshaft.

It was the word "pop" that I reacted to.
It seems the more people trivialize something the hackier the work ends up.
They are usually cobbled together messes.
Not saying yours is going to be , it was just that word.
Yes, depending on trans, there will be a good chance you can save the driveshaft.
Just dont let the front mounts and holes force placement.
If you want personal opinions on front mounts, feel free to PM

"35 years " so just startin out then 😉😅

 

[95wagon]

pop an LS in the wagon

Yeah, cuz they just drop in🤔🙄
Driveshaft depends on engine placement and transmission choice.
Case in point, my LT1 auto, my LT1 manual, my LS manual, I never changed postion of the trans output , driveshaft length.

 

[95wagon]

Next time maybe ,

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