3.PF and Class Variants

[ATHATH]

In a 3.PF game, can I use class variants and ACFs from 3.5 classes with their PF equivalents? For example, the Targetteer Fighter variant modifies the Fighter's bonus feats, proficiencies, and skill list- can I apply that variant to the PF Fighter, since it has all 3 of those things (and the bonus feats are given at the same levels, too!)?

[Psyren]

There are no hard rules for combining 3.5 and PF - it's all about what your GM decides. Personally I'm fine with combining archetypes and ACFs, and in some cases I will even let them replace the same things (e.g. archetype replaces A,B,C, then take ACF that replaces B for something better.)