It would seem, I have found the limit of PY rods...
Gutted a piece of block also ended up splitting the rad:
Never rains and all that.
Will strip engine out of the car this week and take the head off, I'm guessing 1 set of dead forged pistons, a written off BV head, and probably scrap crank.
So, challenge- fit steel rods to a built 1341cc motor and freshen up bolts/gaskets too, all before BVF (with 4 days away with the mrs inbetween) time to stock up on midnight oil