My home inspection of Speedmaster heads

yeah, give or take a tenth. I know if I'm there on a hot & humid day vs cool dry day, I don't need a weather channel to tell me that. :D
I was at the track one day and thought I'd blown a cylinder or something... I couldn't do anything under a 12-second quarter-mile and it was driving me nuts pass after pass.. I got home and started reading about atmospheric pressure and got a measurement from the track that day and it said I was supposed to be doing 12 seconds or more..