Just picked up a 94 Mighty Max with a g464 and a 5 speed. The engine idles rough for the first 5-6 seconds after starting the truck....I changed the fuel filter, air filter and pcv valve...and it didn't get any better. Also, what weight motor oil are you guys running? I originally changed the oil when I picked up the truck with Castrol HM 5w30, but it's burning/leaking 1 quart every 500 miles....so I changed it again with Rotella 15w40, but the engine developed the infamous valve lash adjuster tick after the change. So I'm at a loss. Any help would be greatly appreciated, thanks guys. I'm a member of Bitog and was advised to join this forum to ask vehicle specific questions.