Here's an update for my coil on plug set up.
I used two plates of 3?16" aluminum and machined them to fit then welded the two plats together. Because
of the weight of the coils, I used pressed fit stainless steel threaded inserts. I redrilled and
counterbored the coil to use 10/32 cap screws to be the exact length to not sit flush with the backside
of the mounting plate.
The igniters mount directly under the coils hidden away on the opposite side. Since these are so light I
just threaded the plate and used 8-32 cap screws. I milled the cap screws down to also be the exact
right length to not stick out, not just for looks. But they would hit the coils if sticking out past the
mounting plate.
The fins were milled then beveled to aide in the heat dissapation as well as to add some asthetics.The
hole you see in front of the coils on the bottom plate is for the wires to go from the coils to the
igniters. These wires will not be seen when looking from above. The wires that from to anf from the
dizzy will be ran across the bottom side and will also be completely hidden. I will show this in my next
update.
So far I am liking the outcome, I have only the two mounts left to make. I already have one drawn up, I
just need to mill it.
Pics...
A shot of the coils and igniters prior to welding it up to check for fit. And a shot of the SS inserts,
slots, and counterbore work:



