Here it is, all in one 3D-printed piece for a BBC or SBC.

A timing cover with the crank pulley along with a water pump (and pulley), alternator and rubber V-belt.

I took the time to design and print a highly detailed combination of everything associated with the timing cover parts.

The crank pulley is wide enough for another belt if you want to add A/C or power steering.

The rubber belt is length of rubber material that is to be glued together and the seam would be at the bottom of the crank pulley.

If you need more belt material, it can be found here.

Here is a photo of the assembly with the belt in place.

By Teds Modeling, 1/25 scale.