I have several of these Ford ignition module heat sinks ('92-96 trucks, & some others), and it's nearly the perfect size for the FSD. I filed the backside flat before clamping the FSD down and drilling (1/8") thru its holes. Then I tapped it (6-32) to use the original screws, and reused the silicone heat transfer pad.

Owner caption September 2011 · Photo 114 of 401