Measuring for custom pushrods

they should have oil in them. remove the valve spring and install a very light spring, something that you will find in the hardware store. all you need is enough pressure to return the valve to it's seat. do the same thing as before. now cutting pushrods is a bit on the tricky side. you will need a large dial caliper, like a 12" one. measure carefully from the ball end to where the cup seats in the tube. cut it a tad longer so you can grind it to the correct length on your bench grinder. go easy and check often.