Hi guys reason I ask this is I have a bt 20v and I want to do my own port and polish on my head but I can't afford to have my car off the road for a long period of time. I can find silvertop heads cheap enough but I can't find a bt one. So my question is if I port polish a st head can I bolt my cams out of my bt and fit the solver top to my motor????? And is a bt head better then an st head??? Thanks guys