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#719282 02/08/2011 4:44 PM
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what are my options for a rear end when installing a v/8 engine in my 50 chevy 3100 ? can i use a late model silverado ? THANKS!

bob fortner #719390 02/08/2011 10:27 PM
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This decision would require taking some measurements.

dale937 #719419 02/08/2011 11:40 PM
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Yes, I agree with taking measurements for sure, but I think you will find late model rear will be too wide. You can have it narrowed, but depending on axle availability, the cost starts to get up there.

Custom width 9" rears are another option, but very pricey.

For my 59, after some research I decided on a F*rd Explorer 8.8 with disc brakes, limited slip, 3.73 gear, 31 spline axles, 3200lb axle capacity, and 1/2" difference in width, which I found readily available used locally for around $250.

Google "8.8 ford rear end" and you will find sites like this:

http://www.therangerstation.com/tech_library/Axles.html

Gotchas with the "Exploder" 8.8 are that the pinion is offset from center (3" if I recall) and the bolt pattern is 5x4.5.

I've read the offset pinion is within normal limits of the u-joints.

For the bolt pattern dilemma, I’m going to go back to Fatman’s and swap them my hubs with a Chevy pattern (on my IFS Mustang II kit) for F*rd and all will match.


R-Bo

1959 Apache 1/2 ton Big Window, Short bed Fleetside (under reconstruction)
1966 GMC 305V6 in the family
R-Bo #719584 02/09/2011 1:09 PM
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Chevy 10 bolt rear '71-81 camaro. Right width and it's a chevy!!!!! Why use other breed when they are readily available? You just have to move spring perches a little. That's a lot cheaper than cutting axles and shorting rear.


'52 3100 "once a Marine, always a Marine!!
Panhead59 #719646 02/09/2011 6:14 PM
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Put a pumpkin from a 55-62 1/2 ton. You don't have to modify any thing. You will need to use an O-drive trans. or change the gears to 3.38. I understand the rear end from 70's Blazers are the correct width & still retain the 6 bolt pattern. I have a Firebird rear end in my 58 but the front has been changed to 5 hole wheels & disc brakes.


They say money can't buy happiness. It can buy old Chevy trucks though. Same thing.
1972 Chevy c10 Cheyenne Super
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Like Panhead said, the Camaro 10 Bolt will bolt right up with only some minor movement of the spring perches. You can also use 2002 Camaro, Trans Am disc brakes. They too will bolt up.
Match your front bolt patern with the rear and you will be set.


~Jim
BIG CHEVY 3600 #719698 02/09/2011 10:19 PM
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I'm using a Ford Dana 60 with 3.50 gears. The width worked, it was within an inch of the original. All I had to do was cut off and relocate the spring perches and shock mounts.
My GM wheels, I widened the center hole about an eighth of an inch in diameter, and then the 8 lugs fit through just fine.

Easy peazy, lemon squeezy.


52 GMC 3/4 ton pickup
68 Big Block Vette
68 455 Firebird
bob fortner #719723 02/10/2011 12:14 AM
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I use a gm 10 bolt from a 69 camaro had to cut off the perches and use a super slider sprink kit from cpp.evrything bolted in very nicely and the kit moved the axle about an inch and half centering it in the wheel well.You can see some of the pictures on my photobucket link.

Last edited by mustache man; 02/10/2011 12:17 AM.
R-Bo #720511 02/13/2011 12:06 AM
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how much too wide is a late model silverado rear end when adapting t o the rear springs of a 5o chevy 3100 ? Thanks, Bob

bob fortner #720883 02/14/2011 4:17 AM
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About 8", whne you consider the track width differences (61" for the '50, and 66" for a Silverado, with stock wheels) and the wheel bacspace differences (3 1/2" vs 5 1/2").


Bill Burmeister
LONGBOX55 #721174 02/15/2011 4:31 AM
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Mid 70's Camaro worked for me.


Robert C.
If it's true what they say, "You learn from your mistakes,"
I'm a Genius in the making.

1950 3600
Mobileortho #721372 02/16/2011 1:50 AM
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What is the stock rear end width for the 1950 3100? I am looking around for a rear end to swap into mine and was just woundering what width I should be looking at.

Krwtek1 #721438 02/16/2011 5:09 AM
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You should get an assembly manual:
The late 70s/early 80s 10 bolt Camaro is a perfect fit.

http://cgi.ebay.com/ebaymotors/1947...nuals_Literature&hash=item5197b6cf3a


~Jim

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