For this type of tuning you'll want to invest in a set of pin gauges. They are fairly cheap for a small set.

I'd highly recommend buying a new metering block for the secondardy side that has a PV. Does your carb have four corner idle? That is another handy tuning device.

If you are going to drill the PVCR then you'll need to buy a set of small drills and a pin vise drill. (You'll do that once and then you'll decide to buy an adjustable metering block!)

Fully adjustable metering blocks aren't very expensive. BLP has them as well as all of the jets that you need.