thank you both. i will prob run 2000 to 2500 for 20, after all he didn't say it would hurt he just said it wasn't needed. they were very nice i just wanted to get more opinions, that never hurts. i will use the nondeterg oil and i lubed up the cam with molly lube before i installed it. i wished they had sent some with the cam but i just got some crane cams lube.i also have a old dist shaft i put in a drill motor to prime it. i was interested about what they told me on the timing they said 18 to 28 deg advanced. i seem to have to run mine around 15 with the hei. should i shoot for about halfway and try 23 deg or as close as i can get for the start up? also are the stock rocker arm studs fine for this mild cam?