Just swap over the firewall bracket from a later model donor car like I did. You can drill out the spot welds to remove it, and either weld it on the recipient car like I did, or attach it mechanically with rivets, screws, etc..

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- K.C.Adams

'77 300D Euro Delivery
OM617 turbo / 4-speed swap
404 Milanbraun Metallic / 134 Dattel MB-Tex

Current status:
* Undergoing body work

My '77 300D progress thread