Rich Kinsley '64 Dodge Polara 4dr 318poly w/goodies Dodger sent me a Autolite chart and the 75, 85 and AP85 are all the same dimensions with heat ratings of C7, D7 and E7 respectively. I still don't see anything saying which is colder but I do believe the lower number is colder. 75's were what I used before but they are almost impossible to find. I believe they may have discontinued making them. I checked a number of auto parts stores and no-one has any in stock and they aren't listed in their books generally. NAPA did find 12 of them in Salt Lake city for $1.39 each so I ordered them. O'Reilly may be able to find some. They will call me back if they come up with some. Anybody else use these and/or know where to find them? ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.