ET Report Card on the Speedmaster Heads

I wish I was closer. I have a 3.23 open you could try or swap. It would be another interesting video to switch nothing else other than the rear gear and note the performance increase. A 3.55 would really be a plus and not be too radical for highway driving.
those 3.23's for sale ??? I met a FABO guy in Dyersville once.......