Hypothetical... I want build an engine for my Clio (F4R), nothing extreme but I want to buy a used engine, have it on a stand in the garage, take it to bits, clean it, paint it, etc. Then when it's done drop it in my car.
I can buy a second hand engine and gearbox for a pittance (there are enough about with reasonable mileage and good service history) and an engine stand from ebay.
I have a friend of a friend with a machine shop who can do can hone cylinders, skim the head. I can do all the belts, clutch etc while it's out. I also have access to 99% of the tools required.
There's no real point to this except that it's something to do at the weekends.
What do?
TL;DR - How to build engine?