Had my X heads ported

Had my X heads ported - results

K.O. SWINGER said
A set of good x heads cleaned up with a good valve job will go 220 on the intake.
I would be very happy with those numbers you may be on the edge of pump gas friendliness depending what's available in your area.

We are fortunate to have a good supply of 93 octane here in MO.
Had a my distubutor custom curved for the build, no detention yet.