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11-04-2002, 01:43 PM
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#1 |
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Senior Member
Join Date: Oct 2002
Location: Sierra Vista, AZ
Posts: 489
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Rear end and posi
I have a 70 longbed with coil spring and sinle lunger. I am looking for a 12 bolt with 3:73 rear end. Someone offered me a 73, 10 bolt , rear end with leaf springs and 3:73 posi at a good price. Will this fit, without any major modifications. What might the mods be, and what might the cons be to the project.
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11-04-2002, 01:52 PM
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#2 |
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Project Junkie! Fishing Poor!!
 
Join Date: Dec 1999
Location: Olympia,Wa. 98512
Posts: 10,766
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You will need to get a rear end mount set for the controll arm trucks and an adlustable pan hard bar set for it also. You will have to cut the mounts off of the 73 rear then weld the new ones on in their spots making sure to center the rear and get the correct 2 deg. pinion angle befor you weld it. WES www.ClassicHeartbeat.com
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On-line catolog Classic Heartbeat Pickup Parts WEHEPP@comcast.net Call us Toll Free (888) 338-2502 Like Us on Facebook No appointment necessary. 72 BB Chevy Custom Deluxe / Custom Camper 67 I-6 (Soon to be 5.7 LS1) Panel 68 BB Chevy Short Bed 72 6.0 LQ9 Short Bed Chevy 4X4 Olympia's fastest growing truck parts supplier. Olympia's home for Wayward Chevys |
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11-04-2002, 01:53 PM
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#3 |
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Senior Member
Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
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Outside of the 12 bolt being a better rear end, (stronger), the 73 will take some mods to install. The shock mounts are different and adapting the leaf spring rear end to a trailing arms setup could be a little more serious. I would post on the parts board for a ring and pinion and then buy a new posi unit if it were me.
Otherwise, sometimes a complete rear end is available with posi's but most need rebuilding anyway and the rebuilding cost can equal the cost of a new one. Good luck! Jim |
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11-04-2002, 01:56 PM
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#4 |
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Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,402
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There is a saddle, & track rod kit to put that in, just requires a little welding. You will also have 5 lug axles. let me see if i can find the kit...... http://www.classicperform.com/produc...ersion-Kit.htm
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11-04-2002, 02:08 PM
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#5 |
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67-72 Addict!
Join Date: Feb 2002
Location: The TAX State!
Posts: 7,856
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One of our board members had one for sale recently in Georgia for $300 complete. Don't remember the name. I just ordered a new Posi unit from www.tomsdifferentials.com for $280. New bearings and races were an additional $32 plus $18 shipping.
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Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads |
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