The 196 in the 64 has some "interesting" noises coming out of it now that the muffler is back on. It seems to run just fine and has good power, but has a rattle/knock without load when coming back to idle only...I'd say from 1800rpm to idle. That and the fact that I'm positive that the head isn't unleaded friendly is making me rethink the build, and the fact that I've always wanted a 2wd street and a 4x4 Scout in the stables. So since I have 2 s80's I can have both! I have other things to sell to finance the builds (priorities) I will continue the work on the 63 as the off-road machine. It has an awesome engine and is already kinda beat up so trail rash wont be a concern.
I found out that the driver side axle on the rear of the 63 is bent awhile back along with the driveshaft, most likely the source of my vibration issue, and it has a centered d44 tapered rear axle on a d18 t-case. Tomorrow I will start the swap on the rear axle and driveshaft from the 64 to the 63. It's a flanged d44 from a waggy, so its offset for a better driveline angle with the d18 t-case, and its much stronger than the tapered axle and has way better aftermarket support, and I'll gain an e-brake!