Identification on used Mopar Crate 360
What about the first 360 hp crate motor? Unless I missed something, he just said it was a 360 with a single plane. Pretty sure the first 360/360 crate motor had a single plane M1, too, so it could be one of those.
They were LA motors, so the intake bolts would not be vertical like the later 380/390 versions.
Might check the valve springs, too. Just because it has a sinlge plane on it now doesn't mean it wasn't swapped. Pretty sure that all of the regular 360 crate motors had stock heads with standard valve springs to match the base cams, while the higher hp crate motors had upgraded valve springs to match the higher lift cams. Can't tell you what to look for on the valve springs, though.