It's been awhile since I updated this thread.
Had the engine in and try to work out the exhaust manifold set up. Tried the stock truck manifolds, and that did not work. The manifolds stuck out too far, and hitting the steering shaft. Finally rolled the dice on a set of Holley cast iron manifolds, and it fit.
Driver side, clears the steering shaft by at least 0.5".
IMG_1377
IMG_1378
Also I lowered the engine/trans as much as I can in order to minimize the tunnel work. Had to enlarge the steering shaft cut out on the driver side engine mounting bracket.
IMG_1250