A 360’s crank stroke is commonly referred at 3.58.
A 340’s stroke is 3.31.
The old tyme stroker trick in the ‘70’s was to cut the 360 crank to fit into the 340. This with a .030 overbore makes a 372 cid engine. Or 372.61 exactly which some places round up to 373. Which is fine. Factory does this as well. Up and down in the cid. This makes the stock 360 crank a stroker crank for the 273/318/340.
I don’t know if there were big stroke stroker cranks available back then. I’m sure the 3.55 cid stroker crank and the down size crank for the 5.0 SCCA racing effort was. I don’t know about the other up stroke cranks like the 3.79 and all the others in between.
Bigboy’s high compression 372 should be a rip to drive.
