i was at a local stang store today and was asking about some heads... i told him i heard good things about the AFR 165's but then he pointed me in the direction of the trickflow twisted wedge heads. are the trickflow emissions legal and fit without flycutting the pistons? he said yes, but i want to ask people who have them. he also said they outflow the AFR165's. the trickflows are like $200 cheaper also. someone point me in the right direction please