What's you block casting number
That the cover has no paint suggests it's not OE to that engine, or it was removed and cleaned at some point.
273 Questions
- Thread starter RAT ROD AL
- Start date
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That the cover has no paint suggests it's not OE to that engine, or it was removed and cleaned at some point.
65TerrorCuda
Well-Known Member
2465330-3, last digits hard to see behind the exhaust. I rebuilt it in the 90's when I thought everything should get hemi orange and left the cover bare aluminum
Block stamp:
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And it's for a 65 model year.
Very interesting.
Ok I was wrong (again)
Now it looks like...
Blocks
64 and 65 273 casting number 2465330
blocks have the hole /boss
66 - 69 273 casting number 2806030
do not have the hole or boss
67 Cast number 256030 318 block does not have the hole or boss
70 up
Blocks do not have the hole or boss
Timing covers
I have 2 1965 cast timing covers, both have the extra hole.
My 70 up cover does not.
So now there are 4 la timing covers
64-68with the extra hole
69 no extra hole and cast in timing mark on the pass side
70 to 70 something no extra hole, cast in timing mark on the driver's side.
70 something no extra hole, cast in timing mark on the driver's side and externally installed crank seal
I have searched and searched and I can not find a cover WITHOUT a cast in timing mark AND no extra hole.
ALL the covers a have found without a cast in timing mark are cast in 65.
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jeff alder
Well-Known Member
Those tires and small bolt pattern slots should get you over the hump Al.
cudamark
Well-Known Member
It's a '64 block with V273 code stamped into it. It was just a weak stamp on the 2. Those early timing covers had the extra bolt hole to match the early blocks. It was decided that the extra bolt wasn't needed, so, it was deleted on the newer castings. The block casting numbers changed in '67 where they used both the casting number 2806030 and 273-? on the side of the block above the starter.
cudamark
Well-Known Member
No way it could be a poly block. They don't have freeze plugs in the front of the block.
Small blocks had the extra hole and boss on the timing cover through 1967. I just checked my timing covers. When they updated the timing cover castings to the cast in passenger side timing marks in 68/69, the extra boss and hole went away on the timing cover. Not sure if the blocks had the extra hole, the blocks are harder to dig out than the timing covers.
I was able to do a close inspection of my 12/66 build 273 and it does not have the hole or the boss on the block
My casting number is 2806030
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I have timing covers cast in 64,65,66,67 with the extra boss and hole. As I said, I did not check the blocks. When was your timing cover cast? What casting number? What year was your block cast?
JDMopar
Well-Known Member
My 273 block is a 66 casting and it did not have that hole. I used a later 318 crank and timing cover, so the hole would have stuck out like a sore thumb, had it been there. I also looked at the video of where the block was on the CNC machine getting the lifter bores bushed, and the hole is not there. My block did have a factory solid cam and lifters in it when I got it.
jeff alder
Well-Known Member
Did you get the answer you were looking for Al? We are running out of paper...LOL
The OEM cover is long gone due to a hole into the oil.
The one on now is a 70 up
The other 2 covers are both 65 castings, I did not note their part numbers both have the hole
My block is a 2806030 I don't know when it was cast but it was assembled 12/66, and another 68 318 block I had (photos) was a 2536030. Neither have the hole.
Interesting. I figured the extra tapped hole in the block was gone by 68, but maybe 66 or 67.
Do you know your 66 block casting number?
cudamark
Well-Known Member
I have a cover without the cast-in timing mark, and also without the extra hole. It's a Mopar replacement cover sold as one for the early engines with the bolt-on timing indicator. It uses the '78-up seal design too.
What is your block casting number
Hey Jeff just reading all the new post added since last time I saw this. Learning and takin Notes . ( Not that I'll remember where I put the notes later !!!!)
65TerrorCuda
Well-Known Member
Is that the mp tensioner? Nice. I noticed a timing stability improvement with the same setup, even with a new full roller. Quite obvious on the timing light
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