Wrap up!
Top BH bolts where missing, but they are not too difficult to access from above by crawling across the engine I reaching down. (4.0)
Don't even try to do any of this without dropping the transfer case!
I am now a firm and true believer in pre bled hydraulics! It was extremely difficult without instructions on how to install the plastic line but when everything was done; the clutch Works quite well with the new master and slave cylinders.
Be aware of 12 point bolts and plan accordingly, for the 8mm universal joint bolts on the front drive shaft and the rear drive shaft 12 millimeter bolts. Bolt head grab type of sockets are like a tool Sent From Heaven just for this type of work!
Don't even think of doing this without a transmission jack and at least one other garage floor jack!
It seems entirely logical and practical to change the engine and transmission as one unit (without the transfer case) this is hindsight and a mistake on my part because almost 3 years ago I came across a 62,000 mile wrecked 98. Obtained the Engine, m50d and transfer case (only the transfer case was not usable on the older truck).
Engine is still in storage.
This kind of project can seriously affect a friendship with a well-meaning and caring friend that has all the tools necessary but is like myself, older and should not playing in these areas of expertise! but when did that ever stop us!
The truck is now at my house in the rear yard and I'm going to start tinkeringfixing many other issues get this truck to a point where it's a reliable vehicle.
The body is quite rustless the frame and running gear are very Rusty,. Only the area between the rear spring mounts and the rear bumper looks questionable there are no cracks anywhere on the frames otherwise,
All in all, I think it was a good purchase it has brand new tires and now a low mileage transmission. 188k on the od.
Thank you all for contributing advising and encouraging!