yes i used a ring compressor to put them in. um the gap not to sure about. i got tired of ls/v and no built a poor mans type r. timing is perfect. never boosted. got head back from machine shop. its perfect. valve job. resurface and pressure test along with seals. its fine. valve lash done by rang. fuel pressure when turnin on the car if im not mistaken is about 45. meant to be about high 30's at idle.if the rings werent done right then would the pressure make the oil that i put in be pushed thru the rings to the oil pan? there is still oil on top the piston that i put in from b4.