Distributor in a 390...?

Not enough information to tell. The cap and wires are Duraspark, but that is a common modification to points type dizzys. I do not see a Duraspark box mounted to the wheelwell.

I believe Durasparks came about in 1972 or 1973, for sure on the 74 models. Think the 390 was gone by then.

Frank from Deeeetroit

I was wondering about the mod. What is the advantage - tower spacing?

Rob

No real advantage, some think it looks cool. The EI plug wires will probably last longer with the point type ignition system. Its possible that someone installed a Duraspark ignition from a 74ish pickup truck with a 360.

Cap, wires, probably rotor also are 1977+.

Yeah, I don't either. Odd vehicle. Radiator looks like a 360, not 390. (we can't go by the air cleaner sticker)

Late 1974 and all 1975 used the '75 module with the old cap/rotor/wires.

I know the last year for the 360 was 1976.