The "Sonoramic Commando" name was used only by Plymouth in 1960 (361 & 383) and 1961 (383). Dodge called theirs the "D-500 Ram Induction Engine" and was offered on the 1960 Dodge Dart (361 & 383), 1961 Dodge Dart (383), 1960 Dodge Matador/Polara (383) and 1961 Dodge Polara (383). DeSoto offered the 383 version on the 1960 Adventurer under the name "Power Charge". Chrysler offered a 413-cid version of the ram manifold in 1960 (300-F) and 19601 (300-G) but had no specific advertising name for it, The long-ram returned for 1963 which they called "Firepower 390". It was not listed as an Imperial option. And the ram engine was not an option on any Canadian-built Chrysler product. If you wanted a ram engine, you had to order an American-built car. Bill Vancouver, BC ----- Original Message ----- From: ChiPieAlandPaula@xxxxxxx To: mailing-list@xxxxxxxxxxxxxxxx Sent: Sunday, February 09, 2003 11:59 PM Subject: IML: Cross Rams Hello Again, As I understood this system the Long Ram (which is the one that curves over the cylinder banks) was designed to give optimum performance at 2800 rpm. This worked out to the 60 80 mph range. If any of you are old enough to remember the pre-interstate days - you will remember that the average US road was a 2 lane. The optimum speed referred to corresponded to the average passing speeds. The Short Ram was designed for optimum performance in the 4000 to 5000 rpm range. This manifold was specially designed for the drag strip. Additionally, if I remember, the Short Ram had no water jackets. Their finest hour was on the Max Wedge. Also - both the 361 and 383 were available with the previously mentioned Long Ram manifold. The "kicker" was the ad persons hype -- they referred to this application as The Sonoramic Commando!!!!!!! Allan from Billings, Montana