Looking at converting a 86 350 mercruiser engine to fuel injection using a holley marine kit. In there instructions it says to either run the return fuel line back to the gas tank or tie it into the feed line before the fuel pump. I thought it wasn't kosher to run a return fuel line back to the tank. Second they also rec replacing the anti-syphon valve with a higher flow rate one. Where would u get a higher flow rate valve? I'm only considering this cause i can get the kit at a really good price
