K1-s are sold by wiseco now.

As posted any of these cranks will outlast a oem block, ive been beating a eagle 4.00 forged in my street racer that runs 9.40-s at the track for over 12 years, check the mains every year, have replaced them twice and really didnt need to.

Good block machine work, align bore/hone good caps and go big on the clearances and they all should have a long service life with what we do.