have a k-301 on a 1975 JD 212 that I want some more HP out of the old beast.., what I would like to do is use a k-341 bare block and use all the goodies out of the k-301 in it other than the piston,rod & head, will the bearing covers and oil pan and Flywheel,crank,  well, pretty much everything interchange??  if so will I need to bore the main jet or just enrich-en it by the hi speed jet??    Thanks guys..  looks like the 16 & OHC 18 K engines are rare and expensive..  if you can find one