Yes Sir, again <grin> "EY" is the power feed to the ignition.
Figure 8 looks like the GM HEI choice to me. (what came stock)
In that illustration (Fig. Eight) it talks about what to do with the
tach lead. They say to attach the tach lead to the negative
coil terminal.
But... if you are uncertain still, I'd call Mallory's tech help line.
It seems pretty straight forward to me, but I'm not an expert
on their products.
Joe