Early 3.31 (273/318) stroke steel cranks are around. If you’re running an automatic you’ll need to machine the register for the torque converter pilot.
I believe the Chevrolet connecting rod with is slightly wider than the small block Chrysler. You’re gonna wanna confirm that additionally you’ll need to turn down the rod journal diameter for that connecting rod.
If I recall correctly, the article I posted on the 470 hp 318 build the engine builder use the Chevrolet connecting rod.
When you’re running a small cubic engine, the lighter, you can make it reciprocating assembly the more you’re gonna get out of the combination.
Newbormb will likely chime in on the Chevrolet connecting rod application.