318 tear down... it’s about time.

I’m sure you’re correct about the strength.
I am copying the exact blueprint from a previous build. Not trying to reinvent the wheel. I know this engine makes 400hp with pump gas and zero fab work other than engine block machining. I don’t have the expertise to know if 340 rods would change the stroke or force me to use a different parts from that list.

All small block rods are the same length 6.123" from center to center...

The 340 rods are a little beefier/heavier...

However, the 273 crank is balanced for the lighter 318 rods... The 273 crank and 318 rods will work together without any modifications needed...