340 Rod questions

AFAIK all the 340 rods were bushed, as were many 273 and 318 rods. I’m old enough to have taken apart more than my fair share of unmolested stuff and have seen it.

You can change out the rod bearings if the crank isn’t gouged up. I’d for sure double check the clearance with a mic. And I’d measure the rod bores to see where they are. You can do it with a snap gauge and mic but it’s much easier and more accurate with a bore gauge.

If the clearance is wrong, or the rods are tight (which means the clearance is probably wrong) or bell mouthed or over the high side of spec you’ll need to rebuild the rods.