Won't Fire - Need Help!

I forgot to mention "not starting" with the key but firing with a remote indicates that the original coil bypass is not hooked up, depending on what? you have for ignition

The Mopar ign. swit. has two IGN wires, "IGN1" which is run and traditionally dark blue (some years are not) and then "IGN2" which is the coil resistor bypass circuit, tradtionally brown.

The "run" circuit goes DEAD when you twist the key to "start" so you have NO ign voltage. IGN must get voltage from the brown bypass.

On a normal car with coil resistor, that wire connects to the coil + side of the ballast resistor

ON MSD or other ignitions with no ballast, you must hook that wire up with the "run" wire

So far as "the plug" someone posted there's a way to use a rod and measure down from the oil sender like a dipstick. I don't remember the dimension. If the plug is not there, the rod will go further down.

It goes in with the rear main cap removed "up" into the block

Below is a photo I found of the screw in plug. You are looking down the distributor hole, and the wrench is coming in from the rear of the block in which another plug normally sits.