340 Modifications

lead, that's true with every engine Mopar built. Factory specs are out the window when the real parts are measured. NO engine was 10.5:1, even tho they all were rated for it...lol.

MoparJ, the cam I ran was not an XE. they didnt have that line yet. It's the old High Energy series 268H. They do still make them. It had some overlap, but as I said, it passed emmissions for 3 years in CT. It wasn't bad at all. The Extreme Energy XE268H will idle like a kitten like Dave said.