Thanks to the patience of y'all coaching this here rookie...
Update: I was able to obtain a 4:11 from a guy in Arizona who parted out a '68 3/4 ton for $175. Fedex for $70 but at 120lbs, it had to go to a business so I had him send it to my buddy, Bill Sylvia aka Gear Man who has a differential shop here in Orange County (714)537-9495. He inspected it and said it was totally unmolested. No evidence it had ever leaked and the gears had factory mill marks. He did a slight adjustment that took moments. I installed. Just got back from a test drive. I can still take off in 2nd but it winds out much further making it feel like a more normal driving experience. My speedo is not accurate due to taller wheels and this change. Used to scream 4k at about 50. Now I'm around that at 60 (actually 65?) and it's quieter with more room to go faster. As I pushed the envelope, (close to the sound barrier I'm sure) I got a little shaking, probably from those rear duallies not being properly balanced and with crummy tires. When I get new tires and balanced it will probably smooth out. I spent $245 and I can say it's an upgrade worth double that. A guy could probably seek out a Dana from a Dodge or some such, fab up new perches and do better if he could get the rear end cheap. Anyways, I'm happy as a Labrador Retriever with a tennis ball. Next up: power steering... Thanks all!
