Do it! They're awesome seats
15x7 et35 wheels with 195/50 r888 toyos, 10mm spacers up front too
I'm down in Yorkshire, so bit of a trek to collect seats, I've a few things for sale on ebay, if they go, I may well be in touch.
i've built a few B series boxes and this K series box, they are an almost identical design inside bar the shift assembly (rod vs. cable)
the weak point on K's is the shifter cables which use weak rubber bushes, this has been solved with the hybrid racing cables which use 3 solid ends and 1 spherical end
only time will tell, but for a N/A setup i can't see there being an issue with strength
Thats gona be an awesome build. I wish I could afford something like that. Good luck with it. Looking forward to updates!
Forgot to add, k20 has a triple cone 1st gear synchro whereas the B series has a double cone, hence why there is no issue whatsoever selecting 1st in a K\