360 Magnum production date question

-
O

oldirish

Well-Known Member
Joined
Sep 22, 2023
Messages
61
Reaction score
18
Location
Georgia
I've read some of the discussions on here but they don't match up with my casting ID.

The casting number is 53020006-360.

Made in Mexico is cast in near the serial number.

I'd really just like to confirm the production year.
 
Passenger side, 22023
Driver side 53020006-360

It's not what I was expecting either.

IMG_20241006_160945821_HDR.jpg


IMG_20241006_101314877.jpg


IMG_20241006_101209623.jpg
 
A56 said:
Just take a picture of both sides of the clean block and post it. We're just shooting in the dark. Too many digits in that number.
Click to expand...
Right, 53020006 has one to many zeros. Maybe it's like coins and is worth a lot of money because it was stamped wrong?
 

Chrysler Dodge 360 Engine Bare Block 92-01 Magnum casting 53020006-360​

 
oldirish said:
I've read some of the discussions on here but they don't match up with my casting ID.

The casting number is 53020006-360.

Made in Mexico is cast in near the serial number.

I'd really just like to confirm the production year.
Click to expand...
There is really nothing special about any Magnum block until you get into the Mopar cast iron race blocks, but those should identifiable with a casting number starting with a letter P and will have the large letter R cast into the front of the block under the passenger side head deck surface.

Your casting number is typical of 5.9 Magnum engine blocks. The Date on the right side everyone keeps mentioning was easy in the old LA blocks because it was a conventional calendar date like you would normally write on a check. The "date" on yours may be a julian date instead of a calendar date. I am not sure. but there is a pad on the front of the block under the left cylinder deck surface that should have stamped numbers. That will tell you more info about what your block is, or what it came from. I will attach a chart below.
IMG_0976.jpeg
 
Last edited:
Bobzilla said:
There is really nothing special about any Magnum block until you get into the Mopar cast iron race blocks, but those should identifiable with a casting number starting with a letter P and will have the large letter R cast into the front of the block under the passenger side head deck surface.

Your casting number is typical of 5.9 Magnum engine blocks. The Date on the right side everyone keeps mentioning was easy in the old LA blocks because it was a conventional calendar date like you would normally write on a check. The "date" on yours may be a julian date instead of a calendar date. I am not sure. but there is a pad on the front of the block under the left cylinder deck surface that should have stamped numbers. That will tell you more info about what your block is, or what it came from. I will attach a chart below.
Click to expand...
There should be a stamped date on the head but the Julian calendar is a 10,000 day calendar not 20,000 unless that's written down somewhere that I can't find.
 
Bobzilla said:
There is really nothing special about any Magnum block until you get into the Mopar cast iron race blocks, but those should identifiable with a casting number starting with a letter P and will have the large letter R cast into the front of the block under the passenger side head deck surface.

Your casting number is typical of 5.9 Magnum engine blocks. The Date on the right side everyone keeps mentioning was easy in the old LA blocks because it was a conventional calendar date like you would normally write on a check. The "date" on yours may be a julian date instead of a calendar date. I am not sure. but there is a pad on the front of the block under the left cylinder deck surface that should have stamped numbers. That will tell you more info about what your block is, or what it came from. I will attach a chart below.View attachment 1716312830
Click to expand...
Agree but don’t overlook the LA magnum blocks that had roller lifters and LA heads plus the oil feeds for the rockers . I just found one for $150 and will be going to get it on Saturday. SCORE!
 
mbaird said:
Agree but don’t overlook the LA magnum blocks that had roller lifters and LA heads plus the oil feeds for the rockers . I just found one for $150 and will be going to get it on Saturday. SCORE!
Click to expand...
That should be a different casting number than the one OP is asking about in this thread. It will likely be the 92 model year LA casting number mentioned in the thread in post ten above. Start a thread on that one when you get it. I would like to see what it is.
I have a 92 casting block in my Dart and I don’t think it had Magnum engine mount bosses, only LA ears.
I also have a 93 D250 pickup with a 5.9 Magnum and a known history. It uses the LA mounts, has the bosses for Magnum mounts, but the Magnum bosses are not even drilled.
 
I forgot about the Magnum mount pads . And I have one in my Barracuda. Guess I don’t spend much time looking down there . Lol
 
The one Im getting is in a 91 B350. I will start a thread once it’s home .
 
mbaird said:
The one Im getting is in a 91 B350. I will start a thread once it’s home .
Click to expand...
That one should be a hydraulic roller cam LA 360. The block will likely not have the Magnum crankshaft sensor mount in the rear and will likely not have the Magnum engine mount bosses cast in. But it is still a good block to use for a build if nothing is wrong with it.
 
Bobzilla said:
There is really nothing special about any Magnum block until you get into the Mopar cast iron race blocks, but those should identifiable with a casting number starting with a letter P and will have the large letter R cast into the front of the block under the passenger side head deck surface.

Your casting number is typical of 5.9 Magnum engine blocks. The Date on the right side everyone keeps mentioning was easy in the old LA blocks because it was a conventional calendar date like you would normally write on a check. The "date" on yours may be a julian date instead of a calendar date. I am not sure. but there is a pad on the front of the block under the left cylinder deck surface that should have stamped numbers. That will tell you more info about what your block is, or what it came from. I will attach a chart below.View attachment 1716312830
Click to expand...
No engraving at all on the front of the block, all I can find is on the passenger side, 22029 and a couple of tooling wheels for shift and something else?

IMG_20241006_161006652.jpg
 
It might be some odd thing with the Mexico blocks.. The painted block doesnt have a date anywhere on it, just the 09030, and the casting #. I was told it came out of a 03 Durango. The dirty one, doesnt have made it Mexico, has a 97 casting date. I know it came out of a 98 2500,

IMG_3529.jpg


IMG_3524.jpg


IMG_3522.jpg


IMG_3523.jpg


IMG_3521.jpg
 
Bobzilla said:
There is really nothing special about any Magnum block until you get into the Mopar cast iron race blocks, but those should identifiable with a casting number starting with a letter P and will have the large letter R cast into the front of the block under the passenger side head deck surface.

Your casting number is typical of 5.9 Magnum engine blocks. The Date on the right side everyone keeps mentioning was easy in the old LA blocks because it was a conventional calendar date like you would normally write on a check. The "date" on yours may be a julian date instead of a calendar date. I am not sure. but there is a pad on the front of the block under the left cylinder deck surface that should have stamped numbers. That will tell you more info about what your block is, or what it came from. I will attach a chart below.View attachment 1716312830
Click to expand...
Thanks. I havent seen that info on the magnum blocks before
 
I have 360 LA roller block on a stand also. I can take pictures of the casting #'s on it if someones bored and just wants the info..lol
Itll be next week, due to being out of town if interested
 
You must log in or register to reply here.
-

Back
Top