I have a copy of the Vauxhall College V6 Mulit valve engine hand out they used in their training facility. It covers the C25XE (as used in the Calibra and Cav) and the X25XE and X30XE (as used in the Vectra, Omega and the Sintra) and a bit on the X20XEV engine. It is in a PDF format and covers all the technical specs etc. It's a very interesting read if you like technical stuff

If anyone would like a copy, pm me your email address and I'll email you a copy of it.