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#1 |
Registered User
Join Date: Aug 2014
Location: Abilene Tx
Posts: 8
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Cummins In 72 Suspension Question
I have a 72 3/4 ton 4x4 that i am considering throwing a 4BT into. Ever swap I have seen looks to have a 4"ish suspension lift. I this pretty much mandatory? I would like to stay closer to the stock height. Thanks for the help.
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#2 |
6>8 Plugless........
![]() Join Date: Sep 2007
Location: Prairie City, Ia
Posts: 17,140
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Re: Cummins In 72 Suspension Question
With stock height, the oil pan is going to be sitting on your front diff, or pretty darn close. The drive shaft will be all in the way too. A 2.5" lift might get it but the oil pan will still be way close.
__________________
Ryan 1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread 1972 GMC Sierra Grande Longhorn 4x4 1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed 1972 C10 Suburban Custom Deluxe 1969 Chevy milk truck 1971 Camaro RS 5.3 BTR STG3 Cam Super T10 1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project Tired of spark plugs? Check this out. |
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#3 | |
Senior Member
Join Date: Apr 2004
Location: sw colorado
Posts: 2,720
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Re: Cummins In 72 Suspension Question
Quote:
but yes, a lift is generally required. if you want to push the engine back a ways it helps you get it lower, but as ryan said, with the GM front diff, the driveline is close. oil pan can be modified to help with that, but it is easier to lift it a touch. lifted 4 inches and these trucks are still comparable to todays OEM trucks in height. |
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#4 |
Registered User
Join Date: Jun 2014
Location: Zeroday, Ca
Posts: 7
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Re: Cummins In 72 Suspension Question
Sorry to thread steal,does the 2wd need a lift? I have a 70 but just bought complete front crossmember with disc brakes from a 73
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#5 |
6>8 Plugless........
![]() Join Date: Sep 2007
Location: Prairie City, Ia
Posts: 17,140
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Re: Cummins In 72 Suspension Question
No, a 2wd will be fine. There's plenty of room for the cross member. The rear sump of the oil pan may be close to the ground if you plan to lower it though.
__________________
Ryan 1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread 1972 GMC Sierra Grande Longhorn 4x4 1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed 1972 C10 Suburban Custom Deluxe 1969 Chevy milk truck 1971 Camaro RS 5.3 BTR STG3 Cam Super T10 1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project Tired of spark plugs? Check this out. |
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#6 |
Registered User
![]() Join Date: Dec 2004
Location: jackson,ca
Posts: 488
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Re: Cummins In 72 Suspension Question
I have a 72 4x4 with a 6bt. Where my engine is sitting about the lowest I was able to get is a 4" lift using custom leafs from ORD. I wish I could have gone lower but it wouldn't be very usable because of oil pan to front diff clearance.
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1972 c10,2wd,long bed,250,4spd----> 1972 SWB Fleetside 4x4 12v Cummins build thread http://67-72chevytrucks.com/vboard/s...d.php?t=513791 |
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#7 |
Registered User
Join Date: Nov 2013
Location: sedro woolley, washington
Posts: 71
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Re: Cummins In 72 Suspension Question
this sucks. so how about wheeling? if i hit a big enough bump will the diff be pushed into the oil pan???
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#8 |
6>8 Plugless........
![]() Join Date: Sep 2007
Location: Prairie City, Ia
Posts: 17,140
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Re: Cummins In 72 Suspension Question
Yes it can be.
__________________
Ryan 1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread 1972 GMC Sierra Grande Longhorn 4x4 1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed 1972 C10 Suburban Custom Deluxe 1969 Chevy milk truck 1971 Camaro RS 5.3 BTR STG3 Cam Super T10 1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project Tired of spark plugs? Check this out. |
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