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#1
02-26-2005, 04:13 PM
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I have a 1972 Grandville convertable with the 455 bored .030 over and a comp hi energy cam with 2x4's and headers. This is a real boat that I could not be without. I would like to add positraction to this car. Can anyone tell me what rear ends will fit? Some salvage yards are saying that 71 thru 76 are interchangeable if I change the complete unit. What other GM's are interchangeable i.e Caprice,Buick,Olds? Can anyone help me here?
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#2
02-26-2005, 04:13 PM
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I have a 1972 Grandville convertable with the 455 bored .030 over and a comp hi energy cam with 2x4's and headers. This is a real boat that I could not be without. I would like to add positraction to this car. Can anyone tell me what rear ends will fit? Some salvage yards are saying that 71 thru 76 are interchangeable if I change the complete unit. What other GM's are interchangeable i.e Caprice,Buick,Olds? Can anyone help me here?
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#3
02-26-2005, 05:31 PM
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I have a posi and 2:93 ring and pinion from a 73 full size Pontiac if you are interested.
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#4
02-28-2005, 02:41 PM
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I don't think this will fit in my 72 housing as the axles are different. I would prefer to change out the complete unit housing and all.
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#5
02-28-2005, 04:34 PM
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I have the rearend from my 74 grandville 2.93 gears open wheel ,and also have a posi carrier for it ..that u can put in there...u could have a 2.93 posi..
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Darby 74 Grandville 2Dr 455 c.i 4550# 2011 1.60 60 ft,7.33@94.55-11.502@117.74  2017, 74 firebird -3600 lbs (all bests) 1.33 60 ft, 6.314@108.39 9.950@134.32 M/T 275/60 ET SS Drag Radial 2023,(Pontiac 505) 1.27 60 ft, 5.97@112.86, 9.48@139.31.... 275/60 Radial Pro's |
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#6
02-28-2005, 04:49 PM
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Ardo1972:
I don't think this will fit in my 72 housing as the axles are different. I would prefer to change out the complete unit housing and all. </div></BLOCKQUOTE> The ONLY difference between '71-72 MP series rears & '73-75 MP series rears, is the carrier went from bolt-in axle to c-clip design axle. The '73+ c-clip design posi carrier will bolt right in a '71-72 Bonneville-Grandville MP series rear. Am always buying these 31 spline mid series posi carriers 
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Buzzards gotta eat... same as worms. |
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#7
02-28-2005, 05:53 PM
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Pinion Head if you are interested in this,let me know as Ardo is not sure.Doug
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