thanks everyone. someone told me my VIN numbers says it's a factory 400 4spd car. I bought a 68 440 with 915 heads? so i'm a body guy not mechanic. I did rebuild the clutch two winters ago. the story is the guy I bought car off of put a small block in to give his dad a last ride before he passed away. when I changed the clutch I had to pull a torsion bar to make room. looks like the motor was to close to firewall or i'm just special. in the trunk it had motor mounts and another bell housing.