The pushrod length is not going to make an difference on your P/V to valve clearance, at least nothing notable. You can check P/V clearnce with what you have there now.
All I have right now is just the wimpy checking tool (I don't have a set of checking springs). I do have the adjustable roller lifter so I was going to use that with the new pushrods when I get them and check the PV clearance and wipe pattern on the valve stem tip. I'm not sure how to check the PV clearance without a real pushrod or swapping in checking springs. I would be afraid that the pushrod checking tool would bend under the pressure from the spring.
Thanks again.
