Engine was strong as an ox when it came out, was also running Piper cams and a few other bits to make a genuine 150bhp. You know what it's like, always on the hunt for a bit more. lol. Mate of ours had an ST170 for breaking and half a joke comment soon turned into an engine sitting in my mums garage and a long list of headaches to make the bugger fit as she didn't want to lose the aircon.