In need in an st170 alternator bracket for rwd please, anyone got one? Thanks

Retro ford or GBS do them

It's going to depend on what alternator your using.

Most wouldn't go with the st alternator due to it being controlled by the ecu. Ie smart charge.

Most people go with the smaller denso type or the old Lucas type but you can make most things fit.

If it's going in a Sierra then you may want to look at mounting it on the exhaust side. There's a guy on face book / Ebay, Da engineering that does a nice laser cut one.

I'm using the older style lucas etc, like from a cvh

As above then, Retroford do one for drivers side Da engineering do one for passenger side but it’s pretty easy to knock one up your self.