Help me understand rebuild vs crate?

I bought a Blueprint 408, worked out very well. Some things you need to keep in mind if you build it yourself, You need to measure everything. You can’t take anyones word for measurements. You need to have or borrow Micrometers for the crank journals, bore gauges for the bores,rod ends, cylinders, a deck bridge with dial indicator. Degree wheel. Ring compressor, syringes to check chamber volume. Torque wrenches. Rod bolt stretch guage. The motto for building engines is the same as the nuclear disarmament “trust but verify”