my first engine rebuild (318) advises

So i am 99% sure rods have been opened least once in engines past.
So brobably getting new rods, bit more costly but least i sould be at safe side, and get some weight savings.

if old pistons have compression distance 1.745 or lower KB167 would actually pop bit over deck, like -0.01''
i suspect that block has been milled bit.

Hopefully i get pistons out today or tomorrow so i can confirm pistons compression distance.