MK65 is soooo last decade man. Get a 65 hero kit. Port the shit out of the intake and exhaust. BLAST.
Hero is the poor man's Metra 80 (the transfers are actually larger than the MK80 big port). Metra 65 is just a glorified stock cylinder. Your choice.
I guess a lot of people are afraid of adding material to the cases or having an angled exhaust. If you want to be one of the cool kids, that's what you have to do, so just do it.