Hello to all, I'm new to your forum and glad to have found you guys. You being mostly Aussies (Yes, I'm a Yank) here makes it even more interesting. I just picked up a Clevo to rebuild w/ my son to put eventually in a '85 F-150 4x4. It's kind of a weird duck. It's a 2 bolt main w/ 4V OPEN chambered heads, flattop pistons and an intake that accepts the spreadbore Autolite 4300 carb. What's the comp. ratio for that setup?? Also, someone has punched a hole at the distributor end of the lifter valley about an inch wide I would guess to drain the valley quicker. Will that also drain the valve covers if they fill? Does this "hole" idea sound advantageous or dumb? I want to address the oiling problem completely w/ this motor, any additional processes besides a higher volume pump? Thanks in advance.