Been a long while since I've put a car into a service place in Ippy.
The last good guys I used have since all closed down (retired).
But there is a pretty ok guy at the BP on Blackstone Road near the 7-11. My brother in law used him to get some stuff done on his EL Falcon, and the guy there was pretty decent.
Apart from that there is a couple of guys in Turley st. just near the uni there (which is where you may have gone to), I havent used anyone there except for Max Anderson, but mostly used him for RoadWorthy's.
I can aska friend who is a good backyard mechanic, he helped me rebuild a few of my motors and does a good job, but I don't think he has much time these days.