witch are the best flowing 273 heads#

I agree on the "302" 318 late model high swirl heads,the ports were redesigned for better flow,they were mostly used on vans and trucks for the most part although i believe the 318 4 barrel motors used in police cars may have used them as well. They are the smaller version of the famed "308" 1985 360 truck head that were so highly sought after before the magnums were introduced.