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SB Mopar Race Block
#1342771
11/28/12 10:30 PM
11/28/12 10:30 PM
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Joined: Nov 2004
Posts: 3,518
pacific northwest
Stroker Scamp
OP
master
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OP
master
Joined: Nov 2004
Posts: 3,518
pacific northwest
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PN# on the block is a P5153477-340
PN# on the box is a P4876673AD (not sure if the
box is original to the block)
I searched a bit with the casting# but no luck
just trying to find out if I do have a 48*,4 bolt 9.6deck,siamese bore, dry sump block?
any help?
footbrake N/A SB 408 Scamp 10.10 @ 132 street/strip
73 Duster 340 street strip 12.79 @ 105
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Re: SB Mopar Race Block
[Re: Stroker Scamp]
#1342772
11/28/12 10:43 PM
11/28/12 10:43 PM
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Joined: Jan 2003
Posts: 2,813
Blue Ridge, VA
Plumb Wired
master
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master
Joined: Jan 2003
Posts: 2,813
Blue Ridge, VA
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BLOCKS
B. Race Blocks- Cast Iron, R3
Building on Mopar heritage, the "R3" race block family offers the latest in design
technology along with the options to meet your specific needs.
Features:
· Process-controlled castings utilizing high-strength cast iron
· 100% CNC machining with full statistical process control
· Thick deck surface and six-bolt cylinder head attachment
(48° blocks) for improved sealing and reliability
· Various options that provide deck height potentials
of 8.900-inch to 9.600-inch
· Tappet angles in both 59° (stock) and 48° are available
(improved valve train geometry)
(59° blocks are not recommended for use with roller tappets)
· Thicker main webbing and pan rail for improved rigidity
· Four-bolt mains in your choice of ductile iron or billet steel
· Machined for "LA" and Magnum head oiling, as well as engine mounts
1 P5153743 Block, Cast Iron, Race, 340 Replacement, Siamese-bore,
4.175" Rough Bore
1 P4876671AD Block, Cast Iron, Race, "R3", Siamese-bore, 3.998" Rough
Bore, 9.000" Deck Height
1 P4876381AB Block, Cast Iron, Race, "R3", Siamese-bore, 4.050" Rough
Bore, 9.025" Deck Height
1 P4876791AD Block, Cast Iron, Race, "R3", Siamese-bore, 3.998" Rough
Bore, 9.200" Deck Height
1 P4876673AD Block, Cast Iron, Race, "R3", Siamese-bore, 3.998" Rough
Bore, 9.600" Deck Height
Not sure on the casting number, it is my understanding several part numbers share the same casting number.
Last edited by Plumb Wired; 11/28/12 10:44 PM.
RIP Monte Smith
aka: OutlawFish
'98 Bickel Dodge Dakota PST
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Re: SB Mopar Race Block
[Re: Stroker Scamp]
#1342773
11/28/12 10:48 PM
11/28/12 10:48 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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I found P4876673AB in one of my books... the letters are updates to it and I dont know what was updated... but what I show is 9.560 deck, siamese,4-bolt iron caps,48*, 318/340 mains with note 1 with is 48* cam tunnel requires cam bearings p4876372 and cam UGL p4876633 or p4876634 
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Re: SB Mopar Race Block
[Re: fishy340]
#1342781
11/29/12 12:58 AM
11/29/12 12:58 AM
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Joined: Feb 2005
Posts: 982
western pennsylvania
b1dartsport
super stock
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super stock
Joined: Feb 2005
Posts: 982
western pennsylvania
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Quote:
Fyi restoration blocks are R blocks also....there showing as of last week 12 48* blocks in stock and the price is 2400+ which is good.
 A Resto Block is a 59 degree wet sump 9.60 R3 with the extra head bolt bosses machined off and the lifter valley opened up. If you want to run a conventional roller lifter like a Crane Ultra Pro it takes a lot of carefull work with a die grinder and sonic checker,but there are some drop in lifters made by Comp. 48* is a much better set up with an R3, its just a pain to locate the goofy cam cores.
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Re: SB Mopar Race Block
[Re: b1dartsport]
#1342782
11/29/12 01:08 AM
11/29/12 01:08 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Quote:
Fyi restoration blocks are R blocks also....there showing as of last week 12 48* blocks in stock and the price is 2400+ which is good.
A Resto Block is a 59 degree wet sump 9.60 R3 with the extra head bolt bosses machined off and the lifter valley opened up. If you want to run a conventional roller lifter like a Crane Ultra Pro it takes a lot of carefull work with a die grinder and sonic checker,but there are some drop in lifters made by Comp. 48* is a much better set up with an R3, its just a pain to locate the goofy cam cores.
Yeah... I have 1 UGL cam left for my engine
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Re: SB Mopar Race Block
[Re: Stroker Scamp]
#1342784
11/29/12 01:23 AM
11/29/12 01:23 AM
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Joined: Oct 2007
Posts: 3,978
Hilltown Pa
1967dartgt
master
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master
Joined: Oct 2007
Posts: 3,978
Hilltown Pa
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Not super common, I have a 55mm one i would sell. I think they get around 475 for a new one ground.
Brett Miller W9 cnc'd heads
STR Chassis fabraction
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Re: SB Mopar Race Block
[Re: Stroker Scamp]
#1342785
11/29/12 01:24 AM
11/29/12 01:24 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Quote:
Quote:
Quote:
Fyi restoration blocks are R blocks also....there showing as of last week 12 48* blocks in stock and the price is 2400+ which is good.
A Resto Block is a 59 degree wet sump 9.60 R3 with the extra head bolt bosses machined off and the lifter valley opened up. If you want to run a conventional roller lifter like a Crane Ultra Pro it takes a lot of carefull work with a die grinder and sonic checker,but there are some drop in lifters made by Comp. 48* is a much better set up with an R3, its just a pain to locate the goofy cam cores.
Yeah... I have 1 UGL cam left for my engine
so are the cams for this block hard to get ahold of? expensive too?
My understanding is they are pretty hard to find and
yes they are pricey and then you still need to have
it ground... all in all it can be $600 - $700 for
a cam
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Re: SB Mopar Race Block
[Re: MR_P_BODY]
#1342786
11/29/12 01:29 AM
11/29/12 01:29 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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Quote:
A Resto Block is a 59 degree wet sump 9.60 R3 with the extra head bolt bosses machined off and the lifter valley opened up. If you want to run a conventional roller lifter like a Crane Ultra Pro it takes a lot of carefull work with a die grinder and sonic checker,but there are some drop in lifters made by Comp. 48* is a much better set up with an R3, its just a pain to locate the goofy cam cores.
Ryan J and possibly others have a CNC program to cut the lifter boss clearances. Here's my resto block that he did.
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Re: SB Mopar Race Block
[Re: ScottSmith_Harms]
#1342787
11/29/12 01:38 AM
11/29/12 01:38 AM
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Joined: Nov 2004
Posts: 3,518
pacific northwest
Stroker Scamp
OP
master
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OP
master
Joined: Nov 2004
Posts: 3,518
pacific northwest
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are there roller lifters that will fit this block with 6 head bolt configuration?
footbrake N/A SB 408 Scamp 10.10 @ 132 street/strip
73 Duster 340 street strip 12.79 @ 105
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Re: SB Mopar Race Block
[Re: Stroker Scamp]
#1342788
11/29/12 05:39 AM
11/29/12 05:39 AM
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Joined: Feb 2005
Posts: 982
western pennsylvania
b1dartsport
super stock
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super stock
Joined: Feb 2005
Posts: 982
western pennsylvania
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Quote:
are there roller lifters that will fit this block with 6 head bolt configuration?
Mopar does not offer a 59* 6 bolt head block. On a 48* motor the lifter bore is moved towards the center of the lifter valley giving clearance for the extra inside bolt or stud mountings. If you had 6 bolts on a 59* head there would be no room for a roller lifter unless you maybe used a Jesel key way lifter with no tie bar,but I'm not sure if there would even be enough room for the intake push rod on any W type offset rocker setup. The pushrod is on an angle which would probably hit the extra bolt boss.
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Re: SB Mopar Race Block
[Re: Stroker Scamp]
#1342790
11/29/12 06:52 AM
11/29/12 06:52 AM
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Joined: Feb 2005
Posts: 982
western pennsylvania
b1dartsport
super stock
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super stock
Joined: Feb 2005
Posts: 982
western pennsylvania
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Quote:
are there roller lifters that will fit this block with 6 head bolt configuration?
Sorry, if you were asking about the 48* block there are plenty of roller lifters out there that fit. If I remember correctly the R3 lifter bore is .400 taller than a stock block, so you would either have to machine the bore down or buy a taller lifter.
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