non-concentric threads is pretty much a myth. not once i seen a kit with theads that weren't concentric.
as far as i know wolverine has 8mm hole in the baffles, pushing 5.45 through that is non- issue no matter how in-concentric things are.
full size AKs are overgassed but not these shorties - typically they require muzzle booster to run reliably because gas block is so close to the end of the barrel. i doubt you will need to mess with the adjustable piston.
pretty much any ALG trigger for AK would be good.