My home inspection of Speedmaster heads

12many said
Not many running Ersons likely but here's how close things are, should be good after spring ends are dressed up:

True that. My stock cast 273 rockers got clearanced with some 340 springs. With a different combination of parts you have to do what is necessary. I don't like the combination I will probably switch to 901 Comp springs instead. These springs were E bay fodder.