Pinion angle question

[4.3LXJ]

OK, so here is a balancing act you will have to address. Castor angle vs pinion angle. Ideally, you should have 5° castor angle. But you won't get it with a low pinion diff. So you will have to split the difference, say 3° pinion angle difference and whatever you can get on castor. Do not go to a positive castor angle. It will mess with your steering. The more castor angle you can retain, the better.

[myjeep]

transfer case 5* pinion yoke 8* caster is 9* drives straight now and no vibration in 2wd and a little in 4wd but it still dry out in chicago. did find out the driveshaft was out of phase so i pulled the 2 halves apart and put the ujoints in phase still a little at 5 mph then goes away faster or slower. all in all its alot better and ill see when the snow flies if there is still a vibe or not. the ujoint is almost maxed out at the transfer case, there is about 3/16 to 1/4 inch of space. dont like that to much.....

need to find out what series the chevy u joint is so i can find a yoke for the transfer case so i can flip the driveshaft the corect way. i found the jeep series is 1310.

thanks for your help.
andy