Does anybody know if a vacuum pump can be added to the head on a turbo motor? I haven't got one to look at but is it possible to cut a hole for the cam actuated rod? Also, what is the difference between NA cylinder heads and turbo heads(hydraulic lifter only)? Could a NA head be put on a turbo motor? TIA Brendan Rudack rudack@ucsub.Colorado.EDU '88 90Q Fenton, Michigan USA