Around here......$150-250 for a complete 2bbl......double/triple that for a 4bbl. A lot depends on condition and year. The best years are '66-7. The crank will bolt into a 318/340 if you're will to rebalance. If it's a manual trans 273 steel crank going into a manual trans. 340 application, no mods are needed but if it's an automatic 273 crank, you will have to have a converter made or the end of the crank will need to be machined to accept the later, larger, converter button. If you found a '68-9 273, it has very little going for it.....cast crank, hydrolic cam, 2bbl only, and no dress-up parts. The '64-5 have the early 273 only heads and intake.