looks we we both need some answers lol as were building the same engine, and both of us are contemplating steel rods however they wont come cheap
im still looing around, if you find out any more info please update this thread

i have heard people getting 300bhp with standard rods, forged pistons & apr bolts.

not sure what size the rods need to be, but the little end of the rod needs opening out to allow the calibra turbo gudgeon pin to fit, The Goodgeon pins used on LET pistons is slightly larger, so the small ends of the zetec rods need to be enlarged to suit.

think this is correct rod sizes

B/END 49.895mm

S/END 13/16

CENTRES 136.180mm