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03-17-2010, 08:31 PM
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#1 |
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"something witty here"
Join Date: Apr 2009
Location: Salmo, B.C, Canada
Posts: 966
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big block swap question
when swapping a bbc in a 2wd, what mounting locations are you guys using for the perches? are you using the holes closer to the rad(like the sbc) or setting it back to the holes that are closer to the cab....
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57 chevy 4x4 70 swb fleetside 4x4 68 burb 2wd: 71 burb 2wd: 350 4spd 71 lwb fleetside 4x4: 350/sm465/205/3.07 eaton posi rear 72 lwb fleetside Cheyenne 454/th400 1991 GMC V3500 CC 4x4 Last edited by Wildstreak; 03-17-2010 at 08:31 PM. |
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03-17-2010, 08:31 PM
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#2 |
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Registered User
Join Date: Dec 2007
Location: Nanaimo B.C.
Posts: 604
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Re: big block swap question
the forwards location
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I was hooked on these trucks since 1982 when I drove my budys fathers 1968 Custum GMC 396 automatic dana 60 rear with a power lock diff what a ride more fun then we will we can ever tell!! |
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03-17-2010, 08:36 PM
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#3 |
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Account Suspended
 
Join Date: Aug 2005
Location: Southern UT
Posts: 906
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Re: big block swap question
the front holes
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03-17-2010, 08:43 PM
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#4 |
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"something witty here"
Join Date: Apr 2009
Location: Salmo, B.C, Canada
Posts: 966
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Re: big block swap question
will I have to move my tranny back at all? I measured the bbc from bell housing to motor mount and it was the same distance from my tranny to motor mounts with the sbc. so I would think I wouldnt have to move the tranny, but I would like to know if I have to before getting the motor in there and it doesnt fit lol
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57 chevy 4x4 70 swb fleetside 4x4 68 burb 2wd: 71 burb 2wd: 350 4spd 71 lwb fleetside 4x4: 350/sm465/205/3.07 eaton posi rear 72 lwb fleetside Cheyenne 454/th400 1991 GMC V3500 CC 4x4 |
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03-17-2010, 09:35 PM
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#5 | |
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Senior Member
Join Date: Apr 2002
Location: Help! I'm in an office park with its own network of freeways!
Posts: 470
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Re: big block swap question
Quote:
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'67 C20--427 tall deck/SM420, 4.10 HO52 (Michigan has not been kind to the Old Man) '95 Caprice--355 LT1/T56/3.42 8.5" 10-bolt (daily driver, almost 300k on the chassis) '07 Outback--wife's car. 125k & counting. No head gasket or transmission issues yet. *fingers crossed* |
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03-17-2010, 09:46 PM
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#6 |
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"something witty here"
Join Date: Apr 2009
Location: Salmo, B.C, Canada
Posts: 966
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Re: big block swap question
sweet, now I dont have to mod my drive shaft at all
__________________
57 chevy 4x4 70 swb fleetside 4x4 68 burb 2wd: 71 burb 2wd: 350 4spd 71 lwb fleetside 4x4: 350/sm465/205/3.07 eaton posi rear 72 lwb fleetside Cheyenne 454/th400 1991 GMC V3500 CC 4x4 |
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03-17-2010, 10:24 PM
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#7 | |
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Moderator
 
Join Date: May 2007
Location: Southern Cal
Posts: 20,031
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Re: big block swap question
Quote:
 Music to my ears! I am just about to do this on my project as well. No need to cut down the driveshaft!
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1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man RIP FleetsidePaul |
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03-17-2010, 11:45 PM
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#8 | |
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"something witty here"
Join Date: Apr 2009
Location: Salmo, B.C, Canada
Posts: 966
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Re: big block swap question
Quote:
__________________
57 chevy 4x4 70 swb fleetside 4x4 68 burb 2wd: 71 burb 2wd: 350 4spd 71 lwb fleetside 4x4: 350/sm465/205/3.07 eaton posi rear 72 lwb fleetside Cheyenne 454/th400 1991 GMC V3500 CC 4x4 |
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03-17-2010, 10:45 PM
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#9 |
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Junior Member
Join Date: Dec 2006
Location: Southeast Missouri
Posts: 2,436
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Re: big block swap question
I have a '71 C-10 and in order to get the 454 in with the old 4 speed transmission withouth moving the transmission we had to go with newer, '75, big block mounts and drill new holes about an inch forward of the the holes for the small block.
It worked out great because it left plenty of room between the back of the valve covers and the firewall while leaving enough room between the fan and the radiator. The headers we were using required going to the newer style big block mounts. Danny
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'67 Chevy C-20 short stepper - build complete, 454/SM-465. '75 C-30 Single Cab DRW-350 small block/NP-435. '77 GMC-6500 Dump Truck, 427 Tall Deck. '92 GMC K-3500 Duallie, 454/4L80E. |
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03-17-2010, 11:43 PM
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#10 |
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"something witty here"
Join Date: Apr 2009
Location: Salmo, B.C, Canada
Posts: 966
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Re: big block swap question
Im goin to use the tubular perches from online performance (or performance online can never remember lol) they use the new style motor mounts. I didnt really care for the stock ones.
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57 chevy 4x4 70 swb fleetside 4x4 68 burb 2wd: 71 burb 2wd: 350 4spd 71 lwb fleetside 4x4: 350/sm465/205/3.07 eaton posi rear 72 lwb fleetside Cheyenne 454/th400 1991 GMC V3500 CC 4x4 |
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