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440 I guess this is a truck block?

rickseeman

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Somebody gave me this block a few years ago so I thought I would dig it out and work on it. My records don't show this casting number. 4006630-440. I don't know what those 2 tapped holes are in the front of the #1 cylinder are. Guessing I'd say it's a truck block. The VIN stamping is hard to read. The casting date looks like 3-4-75. The top pad says 5T440E second line says 718. I figure someone here knows what this is. Inquiring minds want to know. Thank you.

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That is a late production 75 block used to the end of the 440 production. 4006630-440 not 4406630-440
 
I have a ‘69 383 block that has those bosses. If I recall, the ‘65 C bodies and maybe ‘66 used them for motor mounts. The later ‘67-‘69 A bodies used them for the drivers side motor mount on the 383 and 440. Could be a motorhome used them later.
 
Maybe those extra bolts in the #1 cylinder are for power steering or air compressor?
 
More pix of the A body installation. Most blocks are not drilled and tapped.

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I have some 400's with those bosses but I had never noticed it on an RB.
 
I have some 400's with those bosses but I had never noticed it on an RB.
Yeah. Not often seen. All ‘65 440 blocks I’ve seen have them as they were only put in C and D bodies for the ‘66 MY. The ‘69 factory 440 A bodies all had them as well.
 
If it hadn't had a date on it that's what I would have been thinking.
 
You could say it was out of a truck, if it still had the dipstick plug in it.
 
Those front holes are good for a ground, and chain attachments in a race application.
 
Seems like a mixed bag on the B/RB blocks as far as those mounting lugs. Some blocks are smooth and no provisions. Some blocks have the mounting lugs cast into them not threaded and the others are threaded like the posters pics. Maybe it was a plant thing as far as what was made.
 
I mentioned ‘65 blocks. I haven’t seen more than 15 though.
 
Yeah. Not often seen. All ‘65 440 blocks I’ve seen have them as they were only put in C and D bodies for the ‘66 MY. The ‘69 factory 440 A bodies all had them as well.
The 440 A-body blocks did not have those bosses in the block. The bosses in front of the block down by the oil pump were drilled and tapped. The motor mount itself was similar but bent differently and it had a piece of angle iron welded to it. The angle iron was actually a piece that was from a front shock mount from a pickup. It was something that they must have come up “on the fly” because they were somewhat crude.
 
I have a ‘69 383 block that has those bosses. If I recall, the ‘65 C bodies and maybe ‘66 used them for motor mounts. The later ‘67-‘69 A bodies used them for the drivers side motor mount on the 383 and 440. Could be a motorhome used them later.
The 440 A-body blocks did not have those bosses in the block. The bosses in front of the block down by the oil pump were drilled and tapped. The motor mount itself was similar but bent differently and it had a piece of angle iron welded to it. The angle iron was actually a piece that was from a front shock mount from a pickup. It was something that they must have come up “on the fly” because they were somewhat crude.
 
The 440 A-body blocks did not have those bosses in the block. The bosses in front of the block down by the oil pump were drilled and tapped. The motor mount itself was similar but bent differently and it had a piece of angle iron welded to it. The angle iron was actually a piece that was from a front shock mount from a pickup. It was something that they must have come up “on the fly” because they were somewhat crude.

It’s been a while since I’ve seen a factory ‘69 A body 440 mount, and have seen plenty of 383 mounts. My ‘Cuda is a ‘70 so it used the standard B body mounts. My point was that there are 440’s with those bosses that are tapped. Was originally for the ‘65-‘66 C body. Maybe over the years they were for an industrial mount or motorhome, as the 413 was the big truck RB. Here’s a few from a quick internet search.
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A few had undrilled bosses.
 
My 75 440 has them but my 71 400 does not ...hmmm?
 
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