I think the biggest problem is that there are 100 ways to do it. When I started my swap, the problem wasn't that there wasn't enough info, but TOO much..

So, I just started putting things together and seeing where everything went. I think the weirdest things I've seen so far are stock 3800 crossover won't play nice with 4-spd muncie shift cables, and I still can't figure out why everybody is so eager to low mount the alternator when the stock location works just fine..
Good luck, be sure to search for darkhorizon's ultimate 3800 swap page, gmtuners.com for electrical info, and a bunch of people's sites for mounting.
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Currently in the middle of my 88 + 3800NA swap