Dirt track vent..

if the rules say mopar ok then 18 degree heads on a mopar gotta be ok! if thay allow the chevy bowtie heads then W2's be ok to id imagine! idk bout stock ome ford heads but the big boys fords running the 9N head at 9 degrees! the 21 degree rule is there cause no body hardly runs nuttun but chevy, and the rule is to keep them from angle milling there double humps, to keep cost down...DWB