throughly confused....

[deviledchin]

Hi to all, I have a 71' demon 4spd build date 4-71 and the motor 1-71. What exhaust manifolds orignally would have come on this.
I see 3418623 and 3418621 as a pair, also 2863549 and 2863553 (Hi-po?) as a pair along with other combos?
Were the high performance ones available for this car and how would you know? Any codes?
The car has 25k on it and I would like to keep it as stock as possible.
The original owner swapped out the carb, intake and exhaust.
PLEASE help, way too many numbers......
THANKS in advance.

 

[OldmanRick]

Here are some casting numbers........

http://www.mymopar.com/extcastnumb.htm

Plus this also.......

http://www.forebodiesonly.com/forum/showthread.php?t=3179

http://www.moparchat.com/FORUMS/showthread.php?p=589740

I believe 2863549 pass. & 2863553 Drivers is correct for you assuming your car is a original 340 "H" code car.

 

[deviledchin]

Sorry for the fat fingers in the title. I have noticed several sets with 3418623 and 2863553. Is this a possible match?

 

[OldmanRick]

Sorry for the fat fingers in the title. I have noticed several sets with 3418623 and 2863553. Is this a possible match?

The 3148623 may be correct for a pass side 71'. I'm getting more confused the more i researched....lol. Hopefully a member with a matching number car will chime in. Once the numbers are determined, finding a set may be a even bigger hurdle. Good Luck in your search.