You did not specify, so will assume engine is stock:
The YF is slightly more efficient than the W-1; and since your vehicle is a daily driver, you should not have the exceeding amount of difficulty one can experience with diaphragm pumps on ethanol fuel and collector vehicles which are selectively driven.
If the engine has been modified, the W-1 is easier to modify than the YF.
The W-1 uses a leather accelerator pump, so totally impervious to ethanol-laced fuel.
Jon.
