lotta racing class rule spect factory cast iron heads,..places other than the drag strip!! you up in pacific north west,..go to skaget speedway. what ever and read the street stock rules or limited sortsman rules! i ant pushing the head, ant my heads , just putting the info out there for any body thay can use it!! glad Abodys got you and all your wisdom to help lead guid and direct the mass's,..but tell us all again bout your record braking stroker motor mr. hot shi'ot