The VE pump in many ways is simply a crude version of a VP-44 - operates on much the same mechanical principle, just lacks the "smart" computer brain that allows instant fuel timing and volume adjustment as engine demand changes with load and speed... In terms of flexibility and precise engine control, the VE or P7100's are a step backwards in time - EXTREMELY costly to swap over to, and leave you with an engine that's probably worthless for emissions testing or resale other than off-road use...