heater core part# Jan 18, 2012 6:25:40 GMT -5 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by sigmfsk on Jan 18, 2012 6:25:40 GMT -5 blusmbl asked me about heater cores and here's what I see in the parts catalog.without a/c: 3780746with a/c: 3780733for a non-a/c car, you can get a NOS unit for $240:www.collectorsautosupply.com/query.asp?make=Mopar+Fullsize&year=0§ion=COOLINGor a replacement for $30:www.ebay.com/itm/1974-75-76-1977-PLYMOUTH-DODGE-CHRYSLER-HEATER-CORE-NEW-/310205471386?item=310205471386&vxp=mtrfor an a/c car, all I found was this post from 2007 offering for $220:www.forwardlook.net/300-archive/msg18545.htmlBut if you go to autozone.com and look for a heater core for a 1974 dodge monaco with a 440 U code, it shows only one heater core available:www.autozone.com/autozone/parts/Spectra-Premium-Heater-Core/1974-Dodge-Monaco/_/N-ioqajZ91sh1?counter=0&filterByKeyWord=heater+core&fromString=search&itemIdentifier=491774_0_0_5281and the "details" show "with a/c". So although the pic looks wrong, at least they claim that the part will fit an A/C car.following pic and part list for non-a/c:following pic and part list for a/c:your friend in non-leaky cores,arthur