DDK - Die Deutschen Klassiker

The front struts on my 77 911S appear very brittle on the inside of the car as well as covered in some very old sealant
Firstly does this look factory?
Secondly are these suitable to replace the very brittle mounts?
They are Wolfsburg HD sport front strut top mounts from Design 911
Or would you suggest something else?
Ta lee

The sealant be looks factory, just chip it off

There are a variety of rubber and/or polybush options. Harder rubber means less changing of suspension settings when pressingoin, but with the downside of slightly more vibration & noise.

I fitted SuperPro and can’t comment on any other manuacturers