Tony I'm six hour ahead of you CET you can do the math
Access to a dyno doesn't mean you've done any development
WHO SAID ANYTHING ABOUT .020 UP more like .200 or .302 or .350 I'm not givin you any real numbers for free........ you can do the math
I have nodoubt that the GMC will run
It will run because it has more hp stock than your modded 261 and bags more torque
You do as you wish....I know you are hard headed
I was only suggesting stuff that'd work
Don't get your panties in a twist just cause you know I'm right
Do you know how many heads fit that motor?
Like I said SIX HOURS ahead..........