The ST bottom end has piston spray jets as std does it not...
The cylinder head is different too but can't remember how tbh.

Also compared to the 2wd early engines there superior in most ways..and slightly better than the 4x4 bt lump so I think my statement stands up in court your honour

P.S. that fault code I spoke to you about on the phone was a boost solenoid reading error...fuck knows whats causing that but it'd going to vauxhall tomorrow to sort it out.

Cheers
Dan