Oil pan. Frequently over tightened. Remove and pound the bold holes flat or a little concave. Reinstall with a good gasket Timing cover. Make sure ALL of the old gasket is removed. A spec will = a leak. Cam, call a cam company or 2. Oregon cam may be able to regrind your cam for much better performance. Make sure you have all the info available like weight, tire height, rear end ratio, compression, intake and exhaust configuration, stall, intended use etc to give the right answer. Many cam companies will have a form to fill out with the required information. You can make a screamer with your car!
