You are right that those are the version of the heads I have with the 120 seat pressure. I spoke with Trickflow and they said it should be fine. Howards tech said fine once and then one tech suggested shimming.
I shimmed mine to a installed height of 1.80 to get them to 140ish....PRH said they were Pac 1903 springs....same spring i use on the eddy and Sm heads with flat tappet cams.....just wanted to point that out
