1967 340

Would you want a 73 340 or a 67 340.. duh

If you're gonna run a stroker crank and aftermarket heads, it doesn't matter which year 340 block you use - they are all equally good.

Even if you keep it stock stroke, the 73's cast crank is good for 500 hp.

Only reason I'd be concerned about the year is if I were restoring a stocker and wanted a correctly dated block.