Low compression RV engine. Auto and 2.90 rear gear. 67 Belvedere street car. Has an unknown aftermarket cam in it now. Has an awesome lope! But smells gas'y no matter what I do to stop it. Vacuum, floats, timing. Speaking of vacuum. It only has 7lbs. I think the cam is completely wrong for this engine. I've had this engine for 20 years and it's very reliable.