switching f250 to f350 blocks - Ford Powerstroke Diesel Forum
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post #1 of 18 Old 02-20-2011, 06:56 PM Thread Starter
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switching f250 to f350 blocks

Hey just bought a used set of f350 blocks and ubolts to put on my 250 to raise the rear a lil bit. Is there anything special that I need to do to do this, or is it just a simple swap of the blocks?

Also does anybody know the torq specs for the ubolts, and what springs would I need to add to make it like a 350?

Thanks in advance!

2012 F250 King Ranch

Last edited by smokin_h; 02-21-2011 at 12:53 PM. Reason: added stuff
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post #2 of 18 Old 02-20-2011, 09:25 PM
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Possibly longer U-Bolts......That should be it. Good luck....

2008 F-350 Looongbed CC 4x4 Mini Maxx S@B C.A.I. Delete Pipe , Custom 2 1/2" leveling kit
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post #3 of 18 Old 02-20-2011, 10:15 PM
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simple swap of the blocks and a swap of the badges that be it ..

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post #4 of 18 Old 02-21-2011, 10:17 AM Thread Starter
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got the 350 ubolts, it looks simple enough, but just wanted to be sure....thanks!!

Anybody know the spring difference inbetween a 250 and 350, while its apart I may make the springs like a 350, ive got access to more leaf springs... also the torq specs for the ubolts?

Thanks!!

2012 F250 King Ranch

Last edited by smokin_h; 02-21-2011 at 12:54 PM.
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post #5 of 18 Old 02-21-2011, 06:27 PM
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U bolt torque specs from an Icon lift are 185 ft-lbs...should be the same for the stock U-bolts.

Just because you bendin' strings...doesn't mean your playin' the blues.
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post #6 of 18 Old 02-22-2011, 02:55 AM
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What's the thickness difference between the 250 & 350 blocks?
Thanks,

TEXAS MILE 261.5 MPH
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post #7 of 18 Old 02-22-2011, 04:07 AM
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Quote:
Originally Posted by tricktom1 View Post
What's the thickness difference between the 250 & 350 blocks?
Thanks,
I believe 2"

2008 F-350 Looongbed CC 4x4 Mini Maxx S@B C.A.I. Delete Pipe , Custom 2 1/2" leveling kit
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post #8 of 18 Old 02-22-2011, 04:12 AM
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i will go outside when the sun comes out and snap a pic of my rear end for you so you can see the spring pack on a f350

Casey

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post #9 of 18 Old 02-22-2011, 04:35 AM
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smokin_h,
dont know if this helps but here are some pics i snapped with my camera phone of my spring pack...my truck is stock f350 with leveling kit, the rear is still stock just picked up the front to match rear





Casey

08' F-350 King Ranch 4x4 CCSB
H&S Mini Maxx 300 HD
5" Straight Pipe to 7" rolled tip
AFE S2 PDS
ARP Head Studs
FloPro EGR Delete with Intake Elbow
FloPro CAC pipe
Rebuilt beefed up OEM Up pipes
Deisel Site Coolant Filter
Firestone RideRite Airbags
Leveled
35X12.50R20 ProComp Xtreme A/T
Ranch Hand Front and Rear Replacement Bumpers

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post #10 of 18 Old 02-22-2011, 07:34 AM Thread Starter
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Quote:
Originally Posted by THE SILVER BULLET View Post
i will go outside when the sun comes out and snap a pic of my rear end for you so you can see the spring pack on a f350
Thanks for the pics!! Just looks like the top helper is the only difference, that will be easy to add to the spring pack I would imagine Ill run to ford to get the frame rail brackets and see how bad they wana rape me for the springs, I may go to a spring shop for the helper springs tho if the ford parts guy has rapist tendencies lol.

Thanks FastStrat for the torq specs!!
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