I did that for several sets of heads and then bought a isky 50 CC calibrated plastic tube, no good I finally bought a 100 CC glass burrette like the Summit one with a stand like that from a drug supply vendor in SO CA, that is the way to go in my opinion
That is what NHRA was using in tech tear downs also
I agree with Mike on the glass plate, a 5 inch square plastic plate is better I put a valve relief slot on one side to do Hemi heads that have been cut and have the edge of the intake valve above the head surface. I drilled a 1/4 inch hole in the middle and ended up filling it and put the filler hole up near one edge so it fill better by tilting the heads up to help fill the chambers
I also bought a small hand held grease gun and bought a needle tip to make the grease lay a thin bead around the chamber instead of doing that job by hand
IHTHs