If there is heat damage its best to switch to a LED light bulb which goes not generate any heat and much lower resistance. If you do then you need to replace the blinker switch as there is virtually no electrical drain so the conventional blinkers do not work. Often with these old cars the electrical wires are old and have a lot of resistance causing bulbs to overheat. I've done this with many of my old cars. Ben
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.