If it runs, keep driving it with the MMO, it fixed my old 265 from a rebuild. I had to put a couple hundred miles on before I saw any improvement. Best of luck

Last edited by JiMerit Boltr#43; 03/28/2016 3:54 PM.
It's easier to get forgiveness than permission!
1946 1/2-Ton Chevy
1953 Chevy 3/4-ton Factory Stakebed