experimental 426 max wedge block?
#2065198
05/01/16 12:24 PM
05/01/16 12:24 PM
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Joined: Sep 2006
Posts: 28
Mo. Val. So. Cal
dusterdoug
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Mo. Val. So. Cal
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I have a block with casting number 2406730. According to everything I find that is a 426 wedge/max wedge 1963-1965.
The weird part is the bore measures out at 4.180 not 4.250. I used a dial caliper to measure it. I honed it with a flex hone too check the cylinders for cracks. It has a small lip from wear, and this is where I measured it.
It is not sleeved and has the original bevel around the top of the cylinders for assembly
The second weird thing is that the last 3 digits of the casting number seem to have been ground down! Not completely but almost
The casting date is 8/16/63
the i.d. pad on top has a 41 with an iron cross symbol nothing else,
I am stumped, any suggestions?
72 duster
452 13.5:1, Indy SR's Wiend Team G 1050 holley
1.45 60', 10.52 e.t. 127mph spinning tires
68 Cuda
440 stock bottom end 906 heads 4.30 gears leaf spring with snubber
1.50 60', 11.15 e.t. 120 mph.
65 coronet
5.7 Hemi 46rh trans.
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Re: experimental 426 max wedge block?
[Re: dvw]
#2065265
05/01/16 02:15 PM
05/01/16 02:15 PM
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Joined: Sep 2006
Posts: 28
Mo. Val. So. Cal
dusterdoug
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Mo. Val. So. Cal
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But the casting numbers are specific to the 426. that is what all the casting list say.
So wonder if it could be bored to the 4.25 of the 426?
72 duster
452 13.5:1, Indy SR's Wiend Team G 1050 holley
1.45 60', 10.52 e.t. 127mph spinning tires
68 Cuda
440 stock bottom end 906 heads 4.30 gears leaf spring with snubber
1.50 60', 11.15 e.t. 120 mph.
65 coronet
5.7 Hemi 46rh trans.
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Re: experimental 426 max wedge block?
[Re: dusterdoug]
#2065341
05/01/16 04:40 PM
05/01/16 04:40 PM
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Joined: Aug 2003
Posts: 43,157
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,157
Bend,OR USA
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I'll assume it has the 1/2 NPT size oil pickup boss and not the standard passenger car production size 3/8 NPT pickup, if so then it may have been intended for use in the 1962 Max Wedge warreenty program. That late in the year casting date it may have even been intended to be used as a street 426 block instead of a M.W. motor  This is one of ty]he many reasons I've learn to never say the factory did anything out of the ordinary, especially on our beloved Mopars  As far as boring it out have the block sonic tested by a good shop before deciding   I've had two 413 industrial blocks sonic tested and bore out to the standard 426 4.250 bore size, no problems on the sonic tests BTW, there are more than three 426 wedge block casting numbers 
Last edited by Cab_Burge; 05/02/16 02:59 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: experimental 426 max wedge block?
[Re: dusterdoug]
#2065378
05/01/16 05:46 PM
05/01/16 05:46 PM
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Joined: Nov 2011
Posts: 2,154
Its a TRAP!
DARTH V8Я
Oh No!! I just had a moron attack!
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Oh No!! I just had a moron attack!
Joined: Nov 2011
Posts: 2,154
Its a TRAP!
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Only 413's I know that may have gotten the .070 over was the 029 blocks. All Max Wedges have exhaust valve reliefs on the bores. IF not, it's not a
MW block.
When it takes more than a sweet mullet to prove you rule at the trailer park..
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Re: experimental 426 max wedge block?
[Re: DARTH V8Я]
#2065455
05/01/16 08:40 PM
05/01/16 08:40 PM
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Joined: Jan 2003
Posts: 9,436
Blair County,PA
62maxwgn
master
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master
Joined: Jan 2003
Posts: 9,436
Blair County,PA
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Only 413's I know that may have gotten the .070 over was the 029 blocks. All Max Wedges have exhaust valve reliefs on the bores. IF not, it's not a
MW block. Like this !
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Re: experimental 426 max wedge block?
[Re: dusterdoug]
#2066284
05/03/16 12:39 AM
05/03/16 12:39 AM
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Joined: Feb 2006
Posts: 1,954
Illinois
SGTFURY62
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top fuel
Joined: Feb 2006
Posts: 1,954
Illinois
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I had a 2205697 casting 426 street wedge that had its last three ground down as well. Was stamped on pad V42 HP. Books show that casting number as 413 block and others show was used for both 413 and 426 passenger car applications. I figured bore size was just dependent on what had on hand and needed but always thought the grinding of the last three was odd. Now wonder if had something to do with using non standard block casting for decreased or increased cubes. Along with pad stamping another sign to line worker or future mechanics that something was different with block.
Last edited by SGTFURY62; 05/03/16 12:55 AM.
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Re: experimental 426 max wedge block?
[Re: Cab_Burge]
#2066297
05/03/16 12:54 AM
05/03/16 12:54 AM
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Joined: Feb 2006
Posts: 1,954
Illinois
SGTFURY62
top fuel
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top fuel
Joined: Feb 2006
Posts: 1,954
Illinois
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I'll assume it has the 1/2 NPT size oil pickup boss and not the standard passenger car production size 3/8 NPT pickup, if so then it may have been intended for use in the 1962 Max Wedge warreenty program. That late in the year casting date it may have even been intended to be used as a street 426 block instead of a M.W. motor This is one of ty]he many reasons I've learn to never say the factory did anything out of the ordinary, especially on our beloved Mopars As far as boring it out have the block sonic tested by a good shop before deciding I've had two 413 industrial blocks sonic tested and bore out to the standard 426 4.250 bore size, no problems on the sonic tests BTW, there are more than three 426 wedge block casting numbers Interesting note, in 62 the max wedge blocks still used the 3/8 pickup tube as on regular production 413. The oil pickup tube increased to 1/2 for the 63 production year. Have a factory max wedge 11:1 '62 block and thought odd it had smaller tube. Verified info correct through Darrell Davis. Never knew this till found this block and has always assumed all were 1/2. With his block being stamped 41 I'd think was standard engine as font and stampings different on MW's. Also if just stamped with 41 and Maltese cross only, was probably an over the counter block or replacement block cause otherwise would have date code in front of 41 for production year and an assembly date stamped on pad also.
Last edited by SGTFURY62; 05/03/16 01:01 AM.
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Re: experimental 426 max wedge block?
[Re: dusterdoug]
#2066492
05/03/16 01:46 PM
05/03/16 01:46 PM
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Joined: Sep 2006
Posts: 28
Mo. Val. So. Cal
dusterdoug
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OP
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Posts: 28
Mo. Val. So. Cal
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Thanks guys for all the information.
I have looked over what you all have said and talked to local Mopar Enthusiasts and concluded:
1. it was probably a 413
2. Chrysler did what ever they needed or wanted to get some engines built and put into cars.
Thanks for the info everyone.
72 duster
452 13.5:1, Indy SR's Wiend Team G 1050 holley
1.45 60', 10.52 e.t. 127mph spinning tires
68 Cuda
440 stock bottom end 906 heads 4.30 gears leaf spring with snubber
1.50 60', 11.15 e.t. 120 mph.
65 coronet
5.7 Hemi 46rh trans.
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