(BTW, I ahve no idea why I put this in Marketplace, but if someone wants to move it to General Discussion, feel free.)
No, I don't have a '70 Jimmy... yet. But they do pop up from time to time and are physically identical to my'69- so I like the idea of a matched set. I'm looking for something in probably forlorn shape, if I do it. I'm not into cutting up a good original one. I'd be game for a different engine and a New Process gearbox (since I really like the on in my truck).
My big concern about a V-6 would be the weight. It would weight nearly more than double a 250 and obviously a bit more than an SBC. I'm thinking it would need a beefed suspension. Would the shortened 1/2 tom frame need reinforcing?
So with that in mind, I also thought about another unique GM engine, the Pontiac OHC six. It makes more juice than the Chevy sixes in 230 or 250 CID guise. Since it's based on the Chevy six, I'd guess swapping wouldn't be much of a hassle. Not to mention that GMC's used Pontiac sizes for many years...
I got the 1970 Jimmy brochure from the Old Car Manual project site. Lots of cool brochures, manuals, ads, and articled to look at. Here's the link:
http://www.oldcarmanualproject.com/ Here is the link to the Jimmy brochure:
http://www.oldcarbrochures.org/NA/GM...C-4WD-Brochure
That reminds me, I need to get my '69 brochure scanned...