So the speedmaster heads were measured

I bought a set of there bare CNC heads ..bought their valves...retainers and locks....yes cheap....black friday prices.
Had my local machine shop do a competition valve job with PAC springs....put it on 360 with speed pro hyper pistons...old MP oval track cam .571 lift
In Vegas air it ran a best of 11.19 @ 188.56...Would run high 10s at sea level...

Got a second set done the same way in plastic bags still...A super stocker engine builder did the heads for me and was impressed with them including the quality of the casting...
Your cars always run good, but 11.19 @ 188.56 :lol: