Did my mmodern today
Today I did the jmod to the 300 hp drilling procedure. I also replaced the two aluminum pistons with rubber. Also replaced the bypass valve from solex. I drained completley tq and trans. And installed a b&m super cooler. I replaced old fluid with new mercon v. Two questions. First before removing the valve body there was a small circuit board with two wires going to it. It did not look stock but I could not find a logo on it. And no pictures of it on pages here of jmod procedure? Second the only difference I noticed was fist to second shift was snapper, and seemed to rev higher before shifts but not firm does this sound about right? Not complaining runs good but does not seem to feel like a big performance upgrade.