I suggest that you go to the shop and see for yourself if you can.
I don't recall if my "71 pads were identical, but they were the original ones and I had had no fitment issues with the Porterfilds. The pads should just drop in (ears into the caliper) and my Porterfields did just that. They fit fine and work beautifully compared to the stock pads.
Good luck!
Mark
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.