I have tried everything to ease out my rough idle, it's at 750 dead steady but rough, I've have tried everything, plugs/wires/cap/rotor/valve job/compression test/air intake/timing belts/injector cleaner/motor mounts/new clutch etc. That rough idle is still there. I will see if changing the fuel pump/filter will help. The car is stock, will the walbro pump be cheaper than a stock replacement pump??? And how tough is the install? In tank? How much would it cost to have a shop do it?