You will need to either skim the standard pistons or get a set of LET Vauxhall pistons and have them modded to fit the Zetec rods to drop the compression. You will also need a plate to enable the use of the CVH water pump and will also need the 1.3 CVH cam belt tensioner.

Ian Howell of Fiesta Frenzy/Area Six fame is the Daddy with these engines