Yearone heater core...

Oklacarcollecto said
O'Reilly Auto Parts
$39.99 Each Limited Lifetime Warranty
With Air Conditioning

http://www.oreillyauto.com/site/c/s...re&year=1974&make=Dodge&model=Dart&vi=1088917

whoops, ya got me beat....but here's the napa piece i got $41.99

http://www.napaonline.com/Catalog/C...99001+101968+50056+2056004&Ar=AND(P_RecType:A)