Are there two different flat hoods for Challengers?

[ChallengerHK]

This is just something I've never paid attention to until recently. My 73 flat hood has a pretty prominent raised rib in the center, probably close to half an inch wide. The shaker conversions seem to have something that's more like a crease. Were earlier Challenger flat hoods a different design?

[Challenger6pak]

Yes,  The 70 & 71 hood had a raised area that went around the Dodge symbol, which is located at the front of the hood. 

[ChallengerHK]

Thanks. I remember the bit with the Dodge symbol. What I'm wondering, though, is if the crown line was shaped differently between the 70-71 and the 72-74 flat hoods.

[Matt70]

Does anyone have pics of the differences?

[Jamiez]

70 flat hood: PN 2934850
71 flat hood: PN 3611342
72-74 flat hood: PN 3611378

Source:
Collector's Originality Guide Challenger and Barracuda 1970-1974
Jim Schild  ISBN 978-0-7603-3788-2

[Challenger6pak]

70 & 71 flat hoods look like this one.  The reason for two part numbers is because the 70 hood did not have crumple zones on the back side of it.  It was found that if the hood did not fold in a collision it went into and through the windshield.  71 has the crumple zones.

[Challenger6pak]

72-74 flat hood.

[ChallengerHK]

70 flat hood: PN 2934850
71 flat hood: PN 3611342
72-74 flat hood: PN 3611378

So, from the distance in these pics, the center ribs look about the same. Is the only difference between the part numbers that 1) the 70 doesn't have the crumple zone, and that 2) 70 and 71 have the spot for the dodge badge instead of the D-O-D-G-E letters?

[Matt70]

Cool thanks Challenger6pak

[Challenger6pak]

So, from the distance in these pics, the center ribs look about the same. Is the only difference between the part numbers that 1) the 70 doesn't have the crumple zone, and that 2) 70 and 71 have the spot for the dodge badge instead of the D-O-D-G-E letters?

To the best of my knowledge, yes.  I understand that the center ribs are the same size for all years of hoods.  The 72-74 does not reach as far down as the 70-71.  Plus, you have the spot for the 70-71 emblem.  I have not done it myself, but I know a guy who took the badge area out of a rusty 70 hood and welded it into a clean 73 hood.  He then made the hood into a shaker hood.  This way the hood looked correct for a 1970. The shaker hoods were built from flat hoods by Chrysler.  All shakers have the Dodge emblem from the factory.

Matt, I am glad to help.

[ChallengerHK]

Thanks for the help, folks.

[Aussie Challenger]

I knew there was difference but now know for sure, which brings me to an extra question, are the R/T hoods all the same? I suppose from the crumple zone info the '70 & '71 would be different. I have also heard that the Cuba and Challengers had different R/T hoods, any info on this?   

[Jamiez]

Part numbers:

Challenger
70 - Flat: 2934850
70 - R/T: 3417066
70 - N96 Shaker: ?
70 - Fiberglass scoop: ?

Barracuda:
70 - Flat: 2934856
70 - 'Cuda scoops: 3417079
70 - N96 Shaker: 2998805
70 - AAR: 3443686

Challenger:
71 - Flat: 3611342
71 - R/T: 3482618
71 - N96 Shaker: 3443880
71 - N94 Fiberglass:  ?

Barracuda:
71 -  Flat: 3417996
71 - 'Cuda scoops: 3417079 (same as 70)
71 - N96 Shaker: 3443797

Challenger:
72+ - Flat: 3611378
72+ - Rallye (scoops): 3611638

Barracuda:
72+ - Flat: 3417996
72+ - Sport hood (scoops): 3417997

So the Barracuda has different part numbers.  I think they might be a slightly different size?  I'm sure someone knows

[Challenger6pak]

If you look at the part numbers Jamiez has listed there are three R/T hoods.  The 70 is non crumple zone.  The 71 has the crumple zones.  The 72-74 has the crumple zones and the under hood frame was redesigned to hold the different latching unit that was required for the header panel on the 72-74.  Since the Cuda and Challenger are both Ebodies the space between the windshield and front bumper are roughly the same.  It was handled differently by Plymouth and Dodge.  The Cuda uses a header panel in front of the hood.  The Challenger does not.  A challenger hood will fit a Cuda after the header panel is removed. The Cuda hood will fit the Challenger also, but it falls short without the header panel. 

[ragtopdodge]

Although I never saw one, but I heard that over-the-counter OEM replacement shaker hoods post '71 did not have the raised area for the fratzog.