Replace AMC 360 with 304

I'm replacing my old 360 with a remanufactured 304 in my CJ7. Is it possible to tell from which year an AMC engine is build ?

Any other things that I should consider, for example 360 parts that doesn't fit on a 304 ?

Regards, Thomas

Reply to
Thomas Pedersen
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Will the numbers on the side of the block tell you something? Or maybe if the size of the bolt holes are different for either the exhaust manifolds or the alternator might give you a clue to the range of years that motor was built.

AFAIK supposedly the Harmonic Balancer and the DrivePlate/Flywheel are balanced differently. Make sure that little bushing inside of the crankshaft for the Torque Converter is correct for your year vehicle and trans.

I had installed a 304 in my 79 Wagoneer. I even used the 360 HB and Driveplate along with the intake and carb. I had no problems and drove it for about 8 years while getting about 15mpg highway.

Good luck and have fun! ;-)

Reply to
One out of many daves

If you go here: and page down to the section "The AMC/Jeep V8 (290cid, 304cid, 343cid,

360cid, 390cid, 401cid)" you'll find these two links:

"V8 Cylinder Head identification information by Casting Numbers" An Excel-format chart that lists head casting numbers from 1970 to 1981.

A few lines down you'll find "V8 Engine Specifications (Dimensions, Camshafts, Connecting Rods, Pistons... (from '75 TSM)" . It might be useful to you. Note that a lot of the sections are common for the 304, 360 and 401.

This link: isn't very detailed for your application but it might help someone. It gives block, head and crank casting numbers for a variety of AMC engines.

You of course know that the easiest way to ID and date an AMC engine is to decode the Engine Day Build Code: engine Of course since your engine has been remanned it might not have the original tags on it.

This guy says that "the AMC 290, 304, 343, 360, 390, and 401 all share the same external specifications, and the intake manifolds interchange." See: (A junkyard engine spotter's guide.)

This site agrees:

All AMC V8s were made from the same mold, the differences are all in the bode and stroke. Absent a valid EDBC it looks like the best you can hope to do is establish a range of years that your block was made.

Thomas Pedersen wrote:

Reply to
Lee Ayrton

Thanks very much for your reply :-)

Reply to
Thomas Pedersen

Reply to
Lee Ayrton

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