Being a keen Cadillac flathead guy, I get a few guys contacting me with stories of how they are progressing with mostly hot rod engine related stuff. So, I figured it might be a good idea to post information here for others to read and digest. It may end up guiding folks, so they dont make the same mistakes over or give a better idea of what to expect from these engines in hot rods. I'd like folks to post any stories and notes about how things worked out for their engines good or bad. Here is what we do know... Cadillac flathead V8 engines that we take an interest in basically run from about 1937 thru to about 1948. The later engines would push a stock Cadillac to 100mph. They came in 2 engine sizes 322 cubic inch in La salles and 346 cubic inch in Cadillacs. There was am article posted that I found on the internet a number of years ago suggesting that the NY mafia preferred Lasalles as get-away cars with the 322 engine as it was more reliable and rev'ed better. It may also have something to do with that slick famous Lasalle stick shift tranny used is hot rods in later years. The Cadillac flathead engines (in pairs) were also used as a power plants in some American WW2 tanks and gained noteriety as a relaible universal power plant source for numerous military mechanical appliances such as buses, landing barges, pumps and generators. After the war they seemed to turn up every where and again were used in many applications. I could only imagine how plentiful they were at one time after the end of WW2 and I believe all surplus in new condition and cheap to boot. I have heard of warehouses loaded with these engines. I know these engines have been around for years now, but trying to source reliable information and bolt-on performance and modification parts has always been limited. Fortunately, the US military in trying to gain extra HP out of these engines used in the tanks was probably the best original R&D for these engines followed by a few big names like Mallory, Edmunds and Burrell. My knowledge of historical stuff may not be entirely accurate and I may have left some stuff out, it is only my account and if anybody knows better please feel free to add to this information. There seems however to be a gap in time after the big names had made hop up items and then nothing that I know of. If anybody could fill in this space it would be helpful, I know there were folks out there doing stuff but I am just not familiar with names and details... Then out of nowhere from a HAMB point of view a number of luntics all seemed to turn up as HAMB members craving more info and details about these engines, since we all had high hopes of using one of these engines in a future hot rod project. At the beginning information was limited, but as time has gone on a number of us thru necessity have progressed the cause and now it would seem we have compiled quite an array of engine and related information that hopefully will benefit numerous builds and encouraged others to consider the Cadillac flathead engine as a respectible hot rod engine. Now we have a new wave of people producing hop up and accessory items for these engines including myself fiftyV8, 38flattie, Keeper and Cyclone which are all names that come to mind. If I have left anybody of this list of names, my apologies. To see what we as a group have achieved it would be best to visit our community website http://www.flatcaddy.com/products/list.php Just to add a little more glamour to our cause and I guess it was going to be a natural progression, we now enjoy reading the progress posts of 38flattie and his team preparing a some what modified flathead Cadillac engine in a 39 Chevy coupe for a Bonneville debut. This information can be found at; http://www.jalopyjournal.com/forum/showthread.php?t=496866&highlight=flatcad Thankyou and please feel free to post and share your flathead Cadillac experience here for all to read.