I have seen in fiber and pot metal... diference is year related ( 70 or 71 ) or Car model related ? ( regular vs performance 340s )

fiber are earlier PN 29xxxxx , while pot metal are later PN 35xxxxx

All engines Dart/Demon 70-71 = Pot metal, with deep chromed pot metal inserts (approx. 4 inches deep front to back)

All engines Dart/Demon 72 = Fiber, with shallow pot metal chromed inserts
(approx. 2 inches deep front to back)

*The above applies to USA Built/Sold, stuff you might find on an export car, I have no idea

My 71 Demon has plastic fender extensions.

Are you sure they are original?

Have/Had four 71 Darts all with metal ones.

I will try to dig one out tomorrow.
And post pictures.
Anybody know where to get the screws
to mount them ?

I have had a mix of both the fiber and potmetal extensions fo rthe 70 - 71 cars. I have had two LA built Demons, one had the fiber, my current one is potmetal. I have also had Michigan built Demons, and two Swingers IIRC they were all potmetal.

trying to find a pattern on the use. ( If did exist LOL )

Before Jan 1 /71 fibreglass # 2998376/377
After Jan 1/71 to Dec 71 Potmetal-deep bezel #3573788/789
After Dec 71 Potmetal-shallow bezel #3574148/149

so, I was kinda right... date production related ( Pn says that )... all 70s got fiberglass, around half of 71s potmetal

Quote:

---

Before Jan 1 /71 fibreglass # 2998376/377
After Jan 1/71 to Dec 71 Potmetal-deep bezel #3573788/789
After Dec 71 Potmetal-shallow bezel #3574148/149

---

My 71 Demon has it's originals, they are Metal, October 1970 production, Hamtramck.

My 10-70 Demon looks to have its originals as well... they're glass

My 1972 Dart had metal ones and it was original. I can check which chrome piece applies.
My 1970 Dart has metal ones and is original. I will check chrome depth.

Now that I think more about it had a 72 dart with fiber ones.

All part #'s taken from master parts catalogs...I have 3 different 70/71 print editions...the uncommon ,70 only(nearly always tossed) ,and two different 70-71's including the final print April 72.
Scott your car could have been built way after the SPD and who knows when they actually rolled in the potmetal extensions.
And a 72 with glass extensions....highly doubtful but never say never.I can imagine the line guys would be scratching their heads though trying to put the shallow dress up bezels on the deep extensions.

Furyman,

Yes I am quite aware with the variables on SPD's, but the door sticker doesn't lie (October 1970), and neither do date codes on original parts. It was 100% definitely built in October 1970. At any rate, I am on board with "you never know" variables, especially when it came to transition parts across consecutive model years.

Concerning the reliance on parts books, BE CAREFUL! While certainly a valuable reference tool, I've seen A LOT of details vary from parts books as compared to what was actually done in production.

this is becoming interesting... !!!