looking to put an HHO setup on my 2003 ford ranger v6 3.0L

from a previous attempt to building a generator, i still have a flashback arrestor and a PWM laying around but my biggest question is, to volo chip or to not? the companies swear by them (obviously) but the EFIE seems far more effective than a volo chip. i am looking at this kit on Ebay
http://www.ebay.com/itm/160402675623...=p5197.c0.m619

then i will hook up my PWM and buy an EFIE also. anyways i guess the big question is, is this kit worth it? and volo chip or efie? my ranger doesnt have too much room in the engine compartment to set a water tank so i wish to convert my windshield washing fluid container into the bubbler but i dont think it can hold enough pressure? or is this not an issue?

also: should i use a MAF sensor controller with an efie or does it take the efie's place?