Oh, they are so much fun.
The lack of a lip makes it so much more interesting, well that and the fact that the fabbed covers are flat and 318 heads are not.
You lay one of those fabbed covers on a 318 head and push down on the end of the cover and see what happens.
The other end pops up about 1/4 inch.
It takes some creative RTV work, and not making a mess with it is even more interesting.
Bone dry, and zero visible RTV on the first try though.
It has headers and yellow 8mm Accel wires now.