I can appreciate the work and somewhat being different....but really its a bit of a silly swap considering the other bmw engine choices imo.
you can make north of 1000whp on b/k series hondas...many engines can make power these days, so its not something id really worry about when choosing a motor.
that said the 4g is definitely a solid engine.
no idea what the build consists of/what trrans etc. his ratios seem too long to me.