umm, how easy a job do you want it to be?

Vauxhall XE
zetec
duratec
pinto
1.6 xflow
SR20 nissan
YB
2.3 volvo
they'll all go in, think the easiest would be 1.6 xflow, but I wouldnt really bother as they are going for silly money, zetec would be easier than duratec, but duratecs are more tuneable