@the_bullet,
Few things that i pondered on while the idea of custom crusier was in my mind
1. Issues associated with an wear and tear of Old engine and its niggles.
2. Using an engine (model of 80's) that has outdated technology and tons of issues.
3. A custom built is not a perfect machine, unlike the factory built ones, which are gone through various test and configurations to come up with optimum settings of every component, the custom builts are more of kind of juggads. It works great till the juggad is working, otherwise you have to comeup with next juggad.
4. General motors parts are always available for factory built products. Its not same for custom built ones. Simple things like brake wire or lever for custom built would not be found on plain roads, and if you plan to take it to long trips there are lot of niggles to planned.
I would say, A bullet is bullet, till you keep it as a bullet