What would be your preference? Buy it of fix it?
Given two cars that are equal in every way except for the engine, which would you prefer?
A. a clean, complete running engine that has not been redone. Mileage and performance indicate it will need attention at some point down the line.
B. An engine that has been redone by a known shop. Includes the paperwork and list of replacement parts and machining.
Would you rather do it yourself and build it the way you want it, have it done in advance of purchase the way the other guy wants it, or save a few bucks and drive it the way it is until you're ready to go to the next level?