A real Unicorn, Finally 71' Cheyenne Super SWB BB - Page 6 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**special-K** · 02-03-2011, 11:10 PM

I always figured GM went from 396 to 402 for the same reason they took the 283 to 307 and the 327 to 350. For that matter,in cars,the 427 to 454.

Zoomin · 02-03-2011, 11:15 PM

Another angle is that the bore was increased to help make up the loss of power due to the drop in compression, all part of the new science in meeting the new emissions requirements.

**special-K** · 02-04-2011, 08:06 AM

Quote:

Originally Posted by Zoomin

Another angle is that the bore was increased to help make up the loss of power due to the drop in compression, all part of the new science in meeting the new emissions requirements.

That's was always my understanding...with all the V8s. I always figured they called the 402 a 400 for the same reason they round off all the motor displacements. They didn't offer the 400 SBC in trucks and maybe they underestimated the confusion it would bring later.

no moa · 02-04-2011, 10:01 AM

Great truck!

So in all this reading, i'm guessing my chances of finding a real SWB BB truck for under 10k is going to be inpossible? Darn!

**too much stuff** · 02-04-2011, 10:08 AM

Quote:

Originally Posted by BLACK AND BLUE 67-72

And just because it doesn't have an SPID dosen't mean it's not the real deal! I've got two 67's that look like there has never even been an SPID stuck on them, original paint and no old adhesive anywhere to be seen.

I have seen alot of 67s and a few 68s that never had a spid. I am not sure why. I think every truck after 69 got one regardless of the number of options.

**special-K** · 02-04-2011, 10:08 AM

Not impossible,but in nice condition you'd be lucky.

Duncan and son · 02-04-2011, 10:32 AM

Quote:

Originally Posted by too much stuff

I have seen alot of 67s and a few 68s that never had a spid. I am not sure why. I think every truck after 69 got one regardless of the number of options.

Eric, I think the earlier ones were just paper and over a period of time they faded beyond recognition or came off while the later ones were covered with a clear adhesive.

**yote1234** · 02-04-2011, 11:03 AM

sure am getting an edu-ma-kation here !!!!

Kiamichi Kid · 03-22-2011, 05:01 PM

I thought in 1971 it would have a steel floored bed instead of wood.

**DANTIP** · 03-22-2011, 05:03 PM

Wood floor was an option until '72. Should be listed on the SPID as "E81 FLOOR BOARD".

Flint70step · 03-22-2011, 05:27 PM

I would give my left ANYTHING for that sweet truck.Thanks for the pics.Yall be good

02-03-2011, 11:10 PM	#126
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: A real Unicorn, Finally 71' Cheyenne Super SWB BB I always figured GM went from 396 to 402 for the same reason they took the 283 to 307 and the 327 to 350. For that matter,in cars,the 427 to 454. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

02-03-2011, 11:15 PM	#127
Zoomin Man of Mini-Talents Join Date: Sep 2009 Location: Oklahoma City, OK Posts: 4,295	Re: A real Unicorn, Finally 71' Cheyenne Super SWB BB Another angle is that the bore was increased to help make up the loss of power due to the drop in compression, all part of the new science in meeting the new emissions requirements. __________________ Steve Project - Ruth 66 Skylark Project - Lola 60 Biscayne Project - Iron Ox 54 GMC 100 Project - Darth 69 Camaro

02-04-2011, 10:01 AM	#129
no moa Registered User Join Date: Nov 2009 Location: maine Posts: 2,315	Re: A real Unicorn, Finally 71' Cheyenne Super SWB BB Great truck! So in all this reading, i'm guessing my chances of finding a real SWB BB truck for under 10k is going to be inpossible? Darn! __________________ 1972 C10 Deluxe.Shortbed. 402/400. A/C, white interior, needs complete restore. Project Red, white and blue. Used to be a Longbed apperently. http://67-72chevytrucks.com/vboard/s...d.php?t=451950 1971 c10 step 250 3 OTT 1969 c30 TOW-MATER. 307 4 speed, holmes 440 body. http://67-72chevytrucks.com/vboard/s...d.php?t=451082 2006 CTS-V LS2 6spd.

02-04-2011, 10:08 AM	#131
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: A real Unicorn, Finally 71' Cheyenne Super SWB BB Not impossible,but in nice condition you'd be lucky. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

02-04-2011, 11:03 AM	#133
yote1234 Senior Member Join Date: Feb 2003 Location: Gold Canyon Arizona Posts: 4,406	Re: A real Unicorn, Finally 71' Cheyenne Super SWB BB sure am getting an edu-ma-kation here !!!! __________________ 1971 K5 CST Blazer 1965 Chevelle Malibu 283 (sadly sold) 1968 Camaro 327 1968 Honda mini-trail z50a #377 1966 uh 1-D Huey

03-22-2011, 05:01 PM	#134
Kiamichi Kid Registered User Join Date: Jan 2008 Location: McAlester, Oklahoma Posts: 27	Re: A real Unicorn, Finally 71' Cheyenne Super SWB BB I thought in 1971 it would have a steel floored bed instead of wood. __________________ 1969 CST-10 Stepside 1971 C-10 Short Fleetside 1967 GMC 3/4 Suburban 4x4 1972 C-10 Longbed

03-22-2011, 05:03 PM	#135
DANTIP Registered User Join Date: Sep 2001 Location: Fort Wayne, Indiana, USA Posts: 1,888	Re: A real Unicorn, Finally 71' Cheyenne Super SWB BB Wood floor was an option until '72. Should be listed on the SPID as "E81 FLOOR BOARD".

03-22-2011, 05:27 PM	#136
Flint70step Registered User Join Date: Jan 2011 Location: Lake Travis,Texas Posts: 586	Re: A real Unicorn, Finally 71' Cheyenne Super SWB BB I would give my left ANYTHING for that sweet truck.Thanks for the pics.Yall be good



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