[406 ss monte]

i have a set of dart pro-1 215 cc heads. i found a set of Afr race ready heads. my question is which heads would make the most power, & would it be enough power to justify the cost ($1400) of the afr heads? i would sell the dart heads & get most of the money back, but i would still end up spinning around $600. would $600 buck's worth of porting make the dart heads just as good, or better than the Afr's? does anyone know if dart & Afr's heads flow what they say? or are they both inflated number's ?thanks