Re: Hemi block casting dates
[Re: fastmark]
#2918755
05/05/21 08:25 AM
05/05/21 08:25 AM
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Joined: Jan 2003
Posts: 42,714 Spokane Washington
ScottSmith_Harms
Mr Wizzard
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Mr Wizzard
Joined: Jan 2003
Posts: 42,714
Spokane Washington
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Fastmark, no, they did not stamp later blocks like that, the pads were blank aside from possible machining notes and the WT (Water Tested Block) which all Hemi blocks were supposed to receive after being tested.
Last edited by ScottSmith_Harms; 05/05/21 08:27 AM.
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Re: Hemi block casting dates
[Re: curbman68]
#2919375
05/06/21 02:30 PM
05/06/21 02:30 PM
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Joined: Aug 2003
Posts: 43,303 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,303
Bend,OR USA
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That is a Mega block, not a OEM Mopar hemi cast block the cast in M being the key I look at that picture a little closer and maybe that is NOT a M I have a Mega Hemi block motor in my shop now in a 1969 R.R. so I will look at it a little closer later, it definitely has the cast in M on the passenger side, I'll have to look at the casting number on that side of the block
Last edited by Cab_Burge; 05/06/21 02:45 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Hemi block casting dates
[Re: Cab_Burge]
#2919624
05/07/21 10:07 AM
05/07/21 10:07 AM
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Joined: Mar 2007
Posts: 3,148 tennessee,usa
mattsmopars
master
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master
Joined: Mar 2007
Posts: 3,148
tennessee,usa
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That is a Mega block, not a OEM Mopar hemi cast block the cast in M being the key I look at that picture a little closer and maybe that is NOT a M I have a Mega Hemi block motor in my shop now in a 1969 R.R. so I will look at it a little closer later, it definitely has the cast in M on the passenger side, I'll have to look at the casting number on that side of the block What block are you referring to? Matt
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Re: Hemi block casting dates
[Re: Cab_Burge]
#2919640
05/07/21 11:10 AM
05/07/21 11:10 AM
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Joined: Feb 2014
Posts: 1,713 central il.
second 70
top fuel
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top fuel
Joined: Feb 2014
Posts: 1,713
central il.
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That is a Mega block, not a OEM Mopar hemi cast block the cast in M being the key I look at that picture a little closer and maybe that is NOT a M I have a Mega Hemi block motor in my shop now in a 1969 R.R. so I will look at it a little closer later, it definitely has the cast in M on the passenger side, I'll have to look at the casting number on that side of the block Cab here are the 2 mega block castings 1 has full water jackets the 1 with Mopar is siamese. Mike
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Re: Hemi block casting dates
[Re: fastmark]
#2927882
05/28/21 09:28 PM
05/28/21 09:28 PM
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Joined: Jan 2003
Posts: 5,122 Chicago Blackhawks
hemicar1971
master
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master
Joined: Jan 2003
Posts: 5,122
Chicago Blackhawks
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There were some blocks cast in 1974, would have to dig some old Chrysler Performance Books up to remember if there were any long blocks with 1974 Casting or short blocks. I remember Mancini in around 1978 got a few short block Hemis and had them for sale but I dont remember the casting dates on the blocks. The stamping on the bottom of the pan rail I have never come across those markings on another block that was cast in 72-74.The Markings on that pan rail tell the story of the block,.when it was machined, when it was assembled and what number it was assembled at and what year is might of gone into. Since 1974 and up there were no Hemi Vehicles I know of being built the block would be an over the counter something. Top Fuel, Funny Car did not run this block at this time would of been a Keith Black likely for them.
1971 HEMI E BODY REGISTRY
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Re: Hemi block casting dates
[Re: hemicar1971]
#3092965
11/09/22 08:41 PM
11/09/22 08:41 PM
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Joined: Jan 2003
Posts: 10,759 North Dakota
6PakBee
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,759
North Dakota
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There were some blocks cast in 1974, would have to dig some old Chrysler Performance Books up to remember if there were any long blocks with 1974 Casting or short blocks. I remember Mancini in around 1978 got a few short block Hemis and had them for sale but I dont remember the casting dates on the blocks. The stamping on the bottom of the pan rail I have never come across those markings on another block that was cast in 72-74.The Markings on that pan rail tell the story of the block,.when it was machined, when it was assembled and what number it was assembled at and what year is might of gone into. Since 1974 and up there were no Hemi Vehicles I know of being built the block would be an over the counter something. Top Fuel, Funny Car did not run this block at this time would of been a Keith Black likely for them. I have an NOS 1974 casting PN 3690010 with the description in the 1973 catalog as 'Hemi Engine - Blown'.
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: Hemi block casting dates
[Re: AAR4Fun]
#3093406
11/11/22 12:16 PM
11/11/22 12:16 PM
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Joined: Jan 2003
Posts: 10,759 North Dakota
6PakBee
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,759
North Dakota
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Pics..?
Thought block in my last post was a blower block as well until I recently discovered it's a D5 block. Literally, there is NO information about D5 Blocks outside of what folks have posted. All Hemi blocks at that time were cast here in Indy, but this has a different casting number. As far as I can tell, it is a normal casting with the heavier webs and a relocated exhaust pushrod holes.
Be nice to hear from someone who may know more about the D5 Blocks... Buried in the shop. I'll see if I can get to it, no promises. The only way I had of knowing the PN was that what was on the cardboard box it came it. Box has disappeared over the 30 years I've had the block but I recorded the PN as I recognized even then it was an odd PN.
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: Hemi block casting dates
[Re: 6PakBee]
#3093414
11/11/22 12:33 PM
11/11/22 12:33 PM
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Joined: Jan 2004
Posts: 8,349 fredericksburg,va
cudaman1969
master
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master
Joined: Jan 2004
Posts: 8,349
fredericksburg,va
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Some guy awhil back posted that he worked at the foundry that made those blocks and there were many pallet full (a lot) sitting outside, mid 70s or so
Last edited by cudaman1969; 11/11/22 12:34 PM.
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Re: Hemi block casting dates
[Re: 6PakBee]
#3093502
11/11/22 04:20 PM
11/11/22 04:20 PM
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Joined: Mar 2021
Posts: 8 Indy
AAR4Fun
member
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member
Joined: Mar 2021
Posts: 8
Indy
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Did some digging today and found out some additional information. Talked to a gentleman in Illinois who was a close friend of Tom Hoover and worked in the racing industry during that time. Yes, there was such a thing as a D5 block for the D5 Heads. He had not seen a D5 block, but know they existed. He suggested talking to Ray Barton, he may know more about it.
Reached out to Ray and yes, they were a Pro Stock block for the experimental D5 head program and had less water jacket in the Intake pushrod area to allow for the relocated intake pushrod closer to the cylinder, thus the different casting number. He mentioned building a few blown drag boat engines using those blocks in the past and use to come across them from time to time. The block will accept regular Hemi heads without modifications, but was designed for D5 heads.
Now, just have to decide what makes sense for it...
Last edited by AAR4Fun; 11/11/22 04:21 PM.
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