[mr48chev]

On that truck the bellhousing totally supports the transmission so you would have to drop the trans before pulling the engine and bellhousing. Be careful when you drop it out as it weighs close to 100 lbs. The first thing I would do is pull the floor mat and pull the cover/transmission hump out to give you more room to work. Use a floor jack or transmission jack that can handle the transmission safely.

You could leave the bellhousing in the truck but that would mean you would have to pull the clutch and flywheel out the bottom before unbolting the engine from the bellhousing. The only reason I can see for doing that though is so that you could clear the core support with the engine if you leave the nose on the truck. No matter how or when you take the clutch and flywheel out they are both pretty heavy, especially the flywheel so be careful there as the teeth on the flywheel love to hit right on arms or other body parts if the thing drops out unexpectedly when you aren't ready to grasp it right.

Unless you pull the nose off you will have to use an engine lift that can lift the engine pretty high and most cherry picker style engine hoists won't go that high. When the previous owners took the engine out of the 51 1-1/2 ton I have they pulled the grill and cut top off the core support and basically made a mess out of that part of the truck that will take longer for me to repair than it would be for my son and I to lift the whole front fender and grill assembly back on and bolt it up.