well, a guy on the clf answered my question with what i thought was the answer.
oil temp is temp and pressure is pressure. it doesnt matter how many cylinders you have, the gauge should work.
a tachometer is made for certain cylinder cars though. 4 cylinder car = 4 cylinder tach.
i dont know if this helps anyone, but it sure helped me out.
ask a dumb question, get the right answer, save a ton of time and money.