I'm considering purchasing a car advertised on this site. The engine however is not complete. All there is of the motor is the original YW block, crank and #16 heads. How difficult would it be to source the remaining parts to restore the engine to as close to original as possible? I am thinking a crate engine would be a better option short term, but at some stage I would like to get the 400 back in the car. Any thoughts greatly appreciated.