I agree with the others about knowing why the engine was dropped and how sure are you the engine is bad or worth rebuilding if necessary.
The engines are simple but there are some specialized techniques and service tools involved if the engine is rebuilt properly.
The '74 Super Beetle is a good year to have. The interior is a little nicer, the strut suspension allows it to ride and handle better, and the engine has more power than its ancestors and which allows it to cruise along at a pretty decent highway speed.
You might try this. Facing the crank pulley, grasp it with both hands and pull it firmly towards you. You should feel it move a little.
Now shove it the other way firmly.
If you feel a fair amount of movement and hear a thunk sound this means the engine block main bearing saddle for the crankshaft thrust bearing is beat out and a proper rebuild or replacement is needed.
The engine block is magnesium and is softer than the bearings. Hard driving with heavy clutch use is the cause of this. It’s fixable but that goes back to knowledge and special tools such as a line boring tool.