thanks for your help,
yes I did see the race spec one only thing that threw me off was the mounting face didn't look like the roundish/ oval shape like my current one - are they all interchangeable ?
I haven't had one in my hands, but from what I can see in the pics and description, yes, they do appear interchangeable, however you do need to use this 'Race' version with an early Canister type filter head gasket, easy enough.
One thing though I would suggest checking on is I've notice some of these Billet type Oil Filter Heads have the threaded boss for the Pipe at a different angle and so the original steel pipe will no longer fit, necessitating the fitting of a Braided Hose. I'm not at all sure if that's the case here, but would suggest you ask.