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11-22-2005, 12:35 PM
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#1 |
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Senior Member
 
Join Date: Nov 2005
Location: Spokane , Wash.
Posts: 790
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72 vs 73 BBC engine mount towers
What are the differences between 1972 vs 73 Big Block engine mount towers? I need a set for my 72 sb to bbc conversion . I can buy new 73 towers at my local GM dealer for aprox $29 each . Do they fit the same holes ? I can't find any used at the wreckers in my area. Whatta ya think ??
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Can-Am Motorsports 37 Chev Coupe 331 4 speed 5.13 posi . ex-gasser . 64 Biscayne 409 2x4 4 speed 4.11 posi 65 Nova Wagon Drag Car 383 t400 (Dragin-Wagon) 68 c10 cst 396 t400 a/c buckets lwb 4.11 posi (SOLD) Last edited by 409biscayne; 11-22-2005 at 12:37 PM. |
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11-22-2005, 01:48 PM
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#2 |
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Senior Member
 
Join Date: Sep 2005
Location: Lewisville, Nc
Posts: 10,237
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Re: 72 vs 73 BBC engine mount towers
they should be the same don't hold me too it
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David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube Last edited by truckdude239; 11-22-2005 at 01:48 PM. |
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11-22-2005, 06:12 PM
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#3 |
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Registered User
Join Date: Sep 2002
Location: DFW Texas
Posts: 2,269
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Re: 72 vs 73 BBC engine mount towers
I just went through this about 2 weeks ago. The bolt holes on the 73+ wont line up. You will have to drill them and hope you have your engine placement is right or your transmission crossmember wont line up with the holes in the frame. You also have to worry about driveshaft length. The 72's fit without any modifications. I can get you pics of the 72 mounts if you want. I know where an extra set are.
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11-22-2005, 06:19 PM
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#4 | |
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Senior Member
Join Date: Nov 2005
Location: Spokane , Wash.
Posts: 790
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Re: 72 vs 73 BBC engine mount towers
Quote:
 , i'm not sure what i'm looking for . I did buy the stands for a 67-71 , but i'd really like to find the 72's . That extra set is not for sale , is it ??Many thanks.
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Can-Am Motorsports 37 Chev Coupe 331 4 speed 5.13 posi . ex-gasser . 64 Biscayne 409 2x4 4 speed 4.11 posi 65 Nova Wagon Drag Car 383 t400 (Dragin-Wagon) 68 c10 cst 396 t400 a/c buckets lwb 4.11 posi (SOLD) |
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11-22-2005, 07:24 PM
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#5 |
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Junk/Daily Driver Club
Join Date: Feb 2004
Location: Manheim, PA 17545
Posts: 253
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Re: 72 vs 73 BBC engine mount towers
Also 73-up frames are 1/2" taller too. I ran into that with 4X4 engine crossmembers.
Later Willis
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Daily Driver: 1970 C-20 400 sbc,sm-465,Dana 61 one ton SRW rear, 3.07 gears, locker.  There are three kinds of people: those who make things happen, those who watch things happen, and those who have no idea what happened! |
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11-22-2005, 09:46 PM
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#6 |
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Registered User
Join Date: Sep 2002
Location: DFW Texas
Posts: 2,269
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Re: 72 vs 73 BBC engine mount towers
Here's a couple pics of the 72 style mounts. The 73+ have 2 of the "bumps" on the top of the frame mount compared to the 72's 1 "bump".
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11-22-2005, 10:22 PM
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#7 | |
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Registered User
Join Date: Jan 2001
Location: skamokawa, WA, USA
Posts: 527
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Re: 72 vs 73 BBC engine mount towers
Quote:
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70 C10 long fleet, 355/200 4r, 6 lug disc conversion, 3" drop 70 gmc changed to 67/8 chevy, 454 with voodoo cam, th400, all 74 running gear.. in progress |
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