Casting numbers for the small-block Mopar and big-block Mopar engine blocks can be found on the left (driver’s) side of the block, and will consist of seven numerals. These numbers are different than the stamped eight-digit number found on the right side of the engine.

440 has the engine I.D. codes stamped on a machined flat surface (about 3/4″ x 2″) located in front of the intke manifold towards the dirver’s side of the car on the block. The 383/400 has this pad located just in front of the driver’s side cylinder head where the head bolts to the block.

if its a 400 then the ID pad is located to the left hand side of the motor, viewed from the front, just in front of the number 1 cylinder, it will be stamped “400”. This is the easiest way to tell but if you can not read what the pad says you can still tell a 383/400 from a 440..

There really is no such thing as a specific 440 head. The 906’s, 902,452,915 (and there a half dozen more heads) will fit any 383, 400 or 440. They are completely interchangeable. The intake manifolds for a 440 will not fit a 383/400 however without machining or adaptor plate to go the other way.

Another way is you could look at the harmonic balancer, if it is a skinny, flat one it is a 318, a 360 one will be thicker and have a counter weight on the face.

318 and 360 magnum heads are the same casting. 58cc chambers and 1.92/1.625 valves. Your 360 heads are probably just 1.88/1.60 and something like 75cc. The magnums have a 1.6 ratio rocker arm so that will raise your cam lift .

Yes, you can install the 318 heads on a 360.

The 5.2 is a great motor. Easy to work on, lots of aftermarket (not as much as a 302 or 350, but a close third), and quite tough. Fuel economy isn’t as good as the 4.7 and power (stock) is about the same.

5.9 L Magnum V8 The standard 5.9 L created 245 hp (183 kW) at 4,000 rpm and 330 lb⋅ft (447 N⋅m) at 3,250 rpm. It was upgraded in 1998 to 245 hp (183 kW) at 4,000 rpm and 335 lb⋅ft (454 N⋅m) at 3,250 rpm.

The Mopar 360 can make an excellent performance engine. It was introduced with a 2-bbl carburetor in 1971. Not intended as a performance engine, it also featured a cast crankshaft and low compression ratio (8.5 to 1) cast pistons. In spite of this rocky start, the 360 can be built into an excellent street engine.

Voracious 426 Hemi Arguably the greatest Mopar engine of all time, the 426-cubic inch Hemi V8 was introduced to the Dodge brand in 1966.

Registered. I had 180,000 miles on mine before the accident. The motor will easily go 250,000 miles.

Some owners of the iconic dodge ram 1500 have maintained their vehicle for almost 300,000 miles and up to 20 years. Some people have reported over 300,000 miles on their dodge ram 1500. I currently have over 270,000 on mine. I have a 98 dodge with over 500,000 miles on it!

The 5.9 is the old school engine family of the 318/340/and obviously the 360. The preferred engine would be the Hemi. It will use less gas as the 5.9 is a gas hog in the 2003 Ram. The Hemi isn’t….that is, it isn’t a Hemi like the old 426s.