So I was somewhat right in my first post without even knowing it. If you go to an all original vehicle, the numbers should be similar to your numbers. Sorry about the mix-up, but it wouldn't be very easy to set your engine angles without a more complete truck if you go by the ground in my eyes. I've done V-8 swaps in AD trucks but they were complete trucks. I just put the engine in, bolted to bellhousing, sat it on a floor jack with the cross member loose in the frame, took the measurements to center, added a few degrees for the wieght of the engine. Made the marks in the frame, drilled and bolted.
That's how I did it,
Scott