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04-12-2008, 02:47 AM
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#1 |
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67-72 Addicted
Join Date: Oct 2007
Location: Guelph Ontario
Posts: 256
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GMC BB V6 sizes...?
I was trying to find some info on the BB GMC V6's and didnt find much. i know that you could get a 305ci, i tihnk it was available for all of 67-72. Ive also been told that you coulg get other sizes of the BB V6. 351, 401 and 478. Is this true? It would be great if you could share any info about these engine, Thanks
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04-12-2008, 02:55 AM
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#2 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: GMC BB V6 sizes...?
they aren't big blocks, just, truck V6 engines.
305 and 351 were avalible till 69 IIRC the bigger ones, including 2 V6's placed inline with each other (V12) could be had in the bigger trucks. I lost the jolly site link... has ALL the info you could ever want. |
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04-12-2008, 02:57 AM
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#3 |
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I have a radical idea!
Join Date: Jan 2005
Location: Sweet Home Alabama!
Posts: 6,513
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Re: GMC BB V6 sizes...?
__________________
'67 C-30 Dually Pickup 6.2 Turbo Diesel, NP435 ‘72 C-10 SWB , 350 4bbl, TH350 '69 C-10 SWB , 250 L6, 3 OTT '69 GMC C3500, dump truck, 351 V6, NP435 '84 M1009 CUCV Military Blazer 67 C-30 Turbodiesel build thread http://67-72chevytrucks.com/vboard/s...d.php?t=254096 My trucks http://s226.photobucket.com/albums/d...ediafilter=all Member of the 1-Ton Club! |
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04-12-2008, 03:01 AM
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#4 |
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I have a radical idea!
Join Date: Jan 2005
Location: Sweet Home Alabama!
Posts: 6,513
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Re: GMC BB V6 sizes...?
The 305 and 351 were in fact the only ones offered in pickups up to 1969. They could be dealer installed up into the early 70's. The 379, 401, 432, 478, 637 cu in V8 version and the 702 cu in twin six was offered in bigger trucks. The 351E in 67 - 69 models was the highest output pickup version. The 351E is essentially a 351 Magnum from a bigger truck with smaller exhaust manifolds, pickup truck sized water pump housing and oil filter. It did have the big port, big valve Magnum heads, bigger intake, and bigger carb. Here's some side by side of a std 305 head vs the 351E/M head.
Magnum head is the bottom  Magnum head on the right  Magnum intake on the right  Magnum intake on the right 
__________________
'67 C-30 Dually Pickup 6.2 Turbo Diesel, NP435 ‘72 C-10 SWB , 350 4bbl, TH350 '69 C-10 SWB , 250 L6, 3 OTT '69 GMC C3500, dump truck, 351 V6, NP435 '84 M1009 CUCV Military Blazer 67 C-30 Turbodiesel build thread http://67-72chevytrucks.com/vboard/s...d.php?t=254096 My trucks http://s226.photobucket.com/albums/d...ediafilter=all Member of the 1-Ton Club! Last edited by 67_C-30; 04-12-2008 at 03:07 AM. |
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04-12-2008, 03:17 AM
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#5 |
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67-72 Addicted
Join Date: Oct 2007
Location: Guelph Ontario
Posts: 256
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Re: GMC BB V6 sizes...?
So, for GMC's was the 305 standard and the 351 option or were both options? Also i see on the net that people are calling them BB's...?
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04-12-2008, 03:48 AM
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#6 |
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Senior Member
 Join Date: Aug 2005
Location: Los Angeles
Posts: 1,345
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Re: GMC BB V6 sizes...?
The 305 V-6 was standard in 'CM' models '67-'69. The 351E was optional in 'CM' models '67-'68. No 351E's were offered in '69 pickups. The 305 was dropped in March of '69. There were some dealer installed V-6's in pickups as late as '72.
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1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90. |
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04-12-2008, 05:01 AM
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#7 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: GMC BB V6 sizes...?
Yep, in trucks with the first two digits of the VIN being CM or KM, all came with the 305 standard. It was fun when the kid at the parts store (chain type stores) would ask "What was originally in it?" and I'd say a 305 v-6... there reaction was always awesome.
Last edited by Longhorn Man; 04-12-2008 at 05:05 AM. |
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