Looks to me like the engine that you are putting in is the older model pre 1980. So the head casting is going to be different.
Alternator bracket alignment
I am installing a junkyard 258 engine in my 84 CJ5. Transferring the alternator bracket over to the new engine the alignment of the alternator bracket is way off on the bolt on the head. I can modify the bracket easy enough but I want to make sure the belt will line up properly. Also the new head appears considerably shorter than the one removed. Any advise?
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I don’t know how t add to a thread, I slotted the bracket. Does anyone see a big
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problem with this?
problem with this?
I had an extra engine with the exact same problem.
I tried mocking up an AC bracket when I discovered the holes didn't line up
![Motor vehicle Automotive tire Automotive fuel system Gas Automotive wheel system]()
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This looked like a engine from some other vehicle as the temp sensor was on the front of the head instead on the top back of the head.
It was off this much:
![Automotive tire Motor vehicle Bumper Automotive exterior Automotive wheel system]()
I never did figure out if the head was shorter or the block was shorter.
Came to find out that some of the 232cuin engine was a shorter (height) block compared to the 258.
According to the number stamped on the side, it was either a 1972 258cuin or a 1963 232cuin.
But the 232 didn't come out until 1964 and I'm not sure if the 199cuin had the same bellhousing mount as the 258.
But obviously the block was shorter.
This would explain the difference in mounting holes location on the head.
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I ended up stealing the oil pan and putting it on my current engine and scrapping the rest of it.
I tried mocking up an AC bracket when I discovered the holes didn't line up
This looked like a engine from some other vehicle as the temp sensor was on the front of the head instead on the top back of the head.
It was off this much:
I never did figure out if the head was shorter or the block was shorter.
Came to find out that some of the 232cuin engine was a shorter (height) block compared to the 258.
According to the number stamped on the side, it was either a 1972 258cuin or a 1963 232cuin.
But the 232 didn't come out until 1964 and I'm not sure if the 199cuin had the same bellhousing mount as the 258.
But obviously the block was shorter.
This would explain the difference in mounting holes location on the head.
I ended up stealing the oil pan and putting it on my current engine and scrapping the rest of it.
I'll throw in another wrinkle. Our 74 originally had a 232 with the temperature sender port in the front too. A PO had converted the alternator from the Motorola type with external regulator to a GM type alternator. PO put it on the driver's side using what I suspect was the smog/air pump brackets. When I replaced the 232 with a crate 258 whose year is unknown, but pre-1980. I used the same brackets. To get the alternator belt tight I had to cock the alternator on the right bracket inward because the alternator on the left bracket was to the outer extreme.
Right bracket--that's the speedometer cable behind it. It bolts to the block.
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Left bracket
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Within a few days the adjustment ear on the alternator case broke off. No sweat it was overcharging anyway. I put a larger pully to increase the adjustment arc. I had the smallest belt that will work on the alternator.
Right bracket--that's the speedometer cable behind it. It bolts to the block.
Left bracket
Within a few days the adjustment ear on the alternator case broke off. No sweat it was overcharging anyway. I put a larger pully to increase the adjustment arc. I had the smallest belt that will work on the alternator.
Interesting it has the same casting number as the one I had and didn't fit.
See if you can find this number on the driver side. This tells you the year the engine was made
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This along with the other number will help decoding your engine.
So far it could be a 1977 or 1987 258cuin built on February 11th.
or a 1967 199cuin
See if you can find this number on the driver side. This tells you the year the engine was made
This along with the other number will help decoding your engine.
So far it could be a 1977 or 1987 258cuin built on February 11th.
or a 1967 199cuin
I’ll look, thanksInteresting it has the same casting number as the one I had and didn't fit.
See if you can find this number on the driver side. This tells you the year the engine was made
![]()
This along with the other number will help decoding your engine.
So far it could be a 1977 or 1987 258cuin built on February 11th.
or a 1967 199cuin
Interesting it has the same casting number as the one I had and didn't fit.
See if you can find this number on the driver side. This tells you the year the engine was made
![]()
This along with the other number will help decoding your engine.
So far it could be a 1977 or 1987 258cuin built on February 11th.
or a 1967 199cuin
This block has no date cast in it, is that strange?
Those ribs on the side look different also.
that 4 H might be the date code for that block the year it was made.
I'd be the 4 means 1974
Mine was 2 H. Probably built in 1972
They could of changed it to a different style later on.
Ah ha ! found it !
1974-1972 258 CUIN 3.75" Bore, W/O rocker shaft, Bell housing dowel pins hole are 15-1/2" between Centers.
There were 6 different castings in those years.
As opposed to 14-1/2" dowel pins on 70-72 258 engines.
Also, the power steering might be a problem. Your missing a couple of mounts.
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IIRC, the power steering was mounted on the passenger side of the engine.
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so if you are planning to have power steering you might need to look into
Just found out the alternator mounts on the driver side of the engine in 1974.
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that 4 H might be the date code for that block the year it was made.
I'd be the 4 means 1974
Mine was 2 H. Probably built in 1972
They could of changed it to a different style later on.
Ah ha ! found it !
1974-1972 258 CUIN 3.75" Bore, W/O rocker shaft, Bell housing dowel pins hole are 15-1/2" between Centers.
There were 6 different castings in those years.
As opposed to 14-1/2" dowel pins on 70-72 258 engines.
Also, the power steering might be a problem. Your missing a couple of mounts.
IIRC, the power steering was mounted on the passenger side of the engine.
so if you are planning to have power steering you might need to look into
Just found out the alternator mounts on the driver side of the engine in 1974.
I don't know what the current spacing is on a later model CJ but since they called it out in the article, I figured it was something you should check on before installing the engine.
For searching I used a bunch of key words in google until some of them stuck
Like
"AMC Engine Codes"
"Jeep Engine Codes"
AMC 258 block build date"
"258 build dates"
Once I found out what year, it went a little easier.
Here is a screen grab of some history of some of the searches:
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