I've got my heads mixed up, do they have to be refitted to a certain side or are they identical?
they are the same. have a look at the bolt holes on the front (or back) of the heads and you should be able to figure out which way they came off
Body by Holden, Soul by Brock
the Legend will live forever
VN exec T5: 15.1sec @92.2mph 1/4 mile, 9.7sec @ 74.6mph 1/8mile, 2.3sec 60ft, 0-60mph 6.827sec 22/11/07 Gtech competition