Turn the head over and work on the roof of the intake port. Get a long 6" shaft carbide burr cutter so it will reach all the way to the bowl from the intake side.
using a 3/8" cylinder shaped cutter with 6" shaft:
Raise the roof of the port approx 1/8th inch from bowl to exit and carve the flow path on the common wall side of the bowl while streamlining the guide boss. Use a felpro 1205 gasket as a guide. Never mind the BS on the floor of the port for now.
Look at the pic I posted.
Last edited by F-BIRD'88; 01-24-2013 at 12:52 AM.