slant 6 to 360 electrical ??

Just what I did in my Duster. ?6 to 318.

What is it exactly thats throwing you a curve here?

Everything on the '74 pluged in and worked. I had to lengthen the temp wire after some of the wire was dicovered to be damaged. I'm not exactly sure if the OE temp sender wire will reach. I think it was close though.
Other wires had to be shortened.

On ignition, you may want to check ballast ohm's. Thats all I can think of electricaly. The lean burn distributor is just a rotor inside the cap. I did a MP distrib.

Anything else?