Help - R Block P4532908 Info
#802659
09/16/10 02:04 AM
09/16/10 02:04 AM
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Joined: Jan 2005
Posts: 3,699
Newport, Mi
Evil Spirit
OP
master
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OP
master
Joined: Jan 2005
Posts: 3,699
Newport, Mi
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I have access to a Mopar R block P4532908 that I am considering buying. From the pics, it has both mag and LA mounts and 4 bolt center 3 mains, but I don't have any other info yet. All I have seen is it used to be a spec block for some dirt tracks years ago. Any info on it - main size, max bore, siamese or open water jacket, lifter angle, cam diameter, and block mods would help. It seems like the lifter area needs to be trimmed down to work, and a stock timing cover doesn't fit. No mention in Mopar catalog and I don't know where to look for info. Thanks.
Free advice and worth every penny...
Factory trained Slinky rewinder.........
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Re: Help - R Block P4532908 Info
[Re: Evil Spirit]
#802660
09/16/10 10:17 AM
09/16/10 10:17 AM
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Joined: Jan 2003
Posts: 17,841
S.E. Michigan
ZIPPY
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 17,841
S.E. Michigan
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It could have been machined into either P4876672
or P4876792. Water block, 9.200 deck/can be milled to 8.90, 4.08 max recommended bore, 340 mains, and could have been either 48 or 59 deg. depending on machined part number.
Rich H.
Esse Quam Videri
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Re: Help - R Block P4532908 Info
[Re: Evil Spirit]
#802662
09/16/10 10:41 AM
09/16/10 10:41 AM
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Joined: Jan 2003
Posts: 17,841
S.E. Michigan
ZIPPY
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 17,841
S.E. Michigan
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Sure the part number is on the label that's on the box  If no label we have to go by the casting number and visual inspection. Sounds like you have pics? Since the only variable is the lifter angle, just post a pic of the lifter valley area.
Rich H.
Esse Quam Videri
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Re: Help - R Block P4532908 Info
[Re: Evil Spirit]
#802664
09/16/10 11:12 AM
09/16/10 11:12 AM
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Joined: Jan 2003
Posts: 17,841
S.E. Michigan
ZIPPY
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 17,841
S.E. Michigan
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Quote:
Is it that the 59* are tight to the block and 48* are towards the center
Yep!
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Re: Help - R Block P4532908 Info
[Re: ZIPPY]
#802665
09/16/10 12:24 PM
09/16/10 12:24 PM
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Joined: Jan 2003
Posts: 3,504
DFW
mr_340
master
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master
Joined: Jan 2003
Posts: 3,504
DFW
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My R3 block had the last three digits of the part number stamped into the front of the block on the driver's side.
Floyd Lippencott IV
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Re: Help - R Block P4532908 Info
[Re: ZIPPY]
#802666
09/16/10 12:31 PM
09/16/10 12:31 PM
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Joined: Jan 2005
Posts: 3,699
Newport, Mi
Evil Spirit
OP
master
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OP
master
Joined: Jan 2005
Posts: 3,699
Newport, Mi
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I might have to rethink what I want to do if I get this block. I was wanting to put a big inch - 420 or so - small block together, but with that bore size and short deck it looks like about 410" would be about the limit, and that with about a 5.7" rod. This block must be better suited to the short stroke cranks and 9500RPM! Might have to dig an old 5.83 R&P out of the shed...
Free advice and worth every penny...
Factory trained Slinky rewinder.........
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