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12-22-2010, 09:47 PM
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#1 |
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Registered User
Join Date: Aug 2009
Location: Summerville SC
Posts: 49
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big block swap
any help on putting my big block in my 86 3+3 4x4. I'm having a brain fart on the motor mounts. I have another one ton with big block motor mounts in it but it's not a 4x4 n the cross member is not the same. Maybe I'm overthinking this but I'm at a loss. Its better to ask and feel stupid rather than wastse tons of time n still have to ask
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12-22-2010, 10:00 PM
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#2 |
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Registered User
Join Date: Aug 2009
Location: Summerville SC
Posts: 49
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Re: big block swap
Ok,lets try this. anyone know if I need to move the pads or just drop it in?
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12-22-2010, 10:19 PM
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#3 |
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Registered User
Join Date: Mar 2009
Location: Warsaw, IN
Posts: 93
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Re: big block swap
Just drop it in.
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12-22-2010, 10:36 PM
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#4 |
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Registered User
Join Date: Aug 2009
Location: Summerville SC
Posts: 49
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Re: big block swap
So the pads are in the same spot from small block to big block/ if so thanks. I had to put small block in her years ago and just now got another big lock done to put in her.
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12-22-2010, 10:45 PM
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#5 |
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Registered User
Join Date: Mar 2009
Location: Warsaw, IN
Posts: 93
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Re: big block swap
The only thing different between the SBC and BBC is the mount part that bolts to the block, with the BBC being shorter, I think. The bushing, or rubber/metal part, is the same. My BBC came out of a 4wd and it had plates sandwiched between the mount and block that were 4WD specific. Not really sure what they attached to, since I didn't pull the motor, but it looks like they connected braces from the motor to the frame?
And yes, the pad location is the same, as far as distance from the firewall goes. Last edited by cor86; 12-22-2010 at 10:47 PM. |
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12-22-2010, 10:49 PM
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#6 |
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Senior Member
Join Date: May 2004
Location: Binghamton, NY
Posts: 3,469
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Re: big block swap
I've always heard those as clamshells, and they are the same between small block and big block. Car and trucks are different. Doesn't matter 2wd or 4wd, SBC or BBC.
I did many SB to BB swaps, never changed the rubber mounts.
__________________
2000 GMC CCSB 454/4L80 6” lift SAS 1999 Chevy CCSB 454/NV4500 4” SAS 1999 GMC Yukon 350/4L60 6" SAS |
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12-22-2010, 11:17 PM
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#7 |
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Registered User
Join Date: Aug 2009
Location: Summerville SC
Posts: 49
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Re: big block swap
Thanks. I remember now. I have the plates on the small block still. They Have the rods that run down to the inspection cover. On the 4x4 its a heavy aluminum cover and they're suppose to help stiffen the th400 up . Hopefully I can hear her run tommorow. Thanks again
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12-23-2010, 02:32 AM
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#8 |
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Registered User
Join Date: Dec 2010
Location: Visalia, Ca
Posts: 707
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Re: big block swap
just a fact but those are also used on the th350 4x4 trans
__________________
<Brandon> 1974 Chevrolet K5 Blazer 350sbc/SM465/NP205, dana44 front, corp 14bolt rear with 4.10s and a powertrax locker, custom rear bumper 400sbc in the works.  1981 GMC C1500 stepside 250i6, 3spd, 12bolt with 3.08s 2.5/4drop on 15x10 with 275/50r15 81 GMC C3500 cab-chassis dually with utility bed 350sbc, Sm465, 14bolt with 4.10s nv4500 getting ready to go in 1979 Chevrolet K5 R.I.P. http://67-72chevytrucks.com/vboard/s...d.php?t=434096 1976 Chevrolet C10 R.I.P. http://67-72chevytrucks.com/vboard/s...d.php?t=434195 |
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12-30-2010, 10:44 PM
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#9 |
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Navy Radioman Veteran
Join Date: Jul 2007
Location: Western Kentucky
Posts: 1,356
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Re: big block swap
Check my signature for the link to my swap.. went in and fits like a glove. Mounts were the same.
Ken
__________________
1987 Chevrolet R10 Silverado BBC Build thread - SOLD 1986 GMC Sierra Classic - SOLD 1957 Chevy Step Side Daily Driver; 2005 Chevrolet Silverado 4x4 Z71 Stepside - SOLD 2005 Chevrolet Tahoe Z71 |
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