small block 400 in blazers - The 1947 - Present Chevrolet & GMC Truck Message Board Network

fxdxharley · 07-20-2012, 10:59 AM

Does anyone know how many blazers came with the 400 from 70 -72? I have a 400 block im thinking of using and the casting # says its from 70 -80. who has one in there blaz?

**too much stuff** · 07-20-2012, 11:29 AM

None. The only 400 used was in the 2wd trucks and burbs and was actually a big block. (396-402)

fxdxharley · 07-20-2012, 11:36 AM

guess that answers my other question if they were just in trucks and cars. the cast number says its a small block. #3951511
found it here
http://outintheshop.com/faq/casting/castings2.html
so if i use it then i will be special!! haha

Firebirdjones · 07-20-2012, 11:53 AM

The "400" nomanclature was used on the bigblock trucks up through 72 because GM was too cheap to retool for a new emblem,,,that's what that amounts to

Trucks with that emblem (up to 72) actually had a big block 402 in them. GM did the same thing with the car line too, since the 396 already had a following and SS396 sounds catchy (they even wrote a song about it) so a new 402 emblem for 70 was pointless.

The 400 sbc that you are referring to harley was also available in trucks and cars. The engine was first introduced in 1970 and was used in the bigger cars like the monte carlo, impala, etc...and it was in pickups both 2x4 and 4x4 throughout the 70's.

My neighbor bought a 76 short box 4x4 pickup brand new with a 400 sbc. I don't really remember seeing the 400 sbc much after that but my memory fades with age

but I believe the 400 was no longer produced after 76.

**70cst** · 07-23-2012, 11:16 AM

Quote:

Originally Posted by Firebirdjones

The "400" nomanclature was used on the bigblock trucks up through 72 because GM was too cheap to retool for a new emblem,,,that's what that amounts to

Trucks with that emblem (up to 72) actually had a big block 402 in them. GM did the same thing with the car line too, since the 396 already had a following and SS396 sounds catchy (they even wrote a song about it) so a new 402 emblem for 70 was pointless.

The 400 sbc that you are referring to harley was also available in trucks and cars. The engine was first introduced in 1970 and was used in the bigger cars like the monte carlo, impala, etc...and it was in pickups both 2x4 and 4x4 throughout the 70's.

My neighbor bought a 76 short box 4x4 pickup brand new with a 400 sbc. I don't really remember seeing the 400 sbc much after that but my memory fades with age

but I believe the 400 was no longer produced after 76.

Spot on ... Great info

Bigb401 · 07-22-2012, 05:06 AM

Good info!!
Posted via Mobile Device

Scrat · 07-22-2012, 02:09 PM

My 71 came with a 307, but it's got a 407 in it now (400 sb punched 030 over with flat top pistons)

This upgrade tends to make the world a very flat place, if you know what I mean.

fxdxharley · 07-24-2012, 12:34 PM

thanks for the great info firebird.

07-20-2012, 10:59 AM	#1
fxdxharley Just a nother gear head Join Date: Jul 2009 Location: Barrington NH Posts: 501	small block 400 in blazers Does anyone know how many blazers came with the 400 from 70 -72? I have a 400 block im thinking of using and the casting # says its from 70 -80. who has one in there blaz? __________________ 2013 HD FLHX 2000 chevy 2500 6.0l 4x4 3dr 2000 harley fxdx 71 Jimmy 4x4- future crawler/ woods rig 71 blazer (C4 2wd conv project) http://67-72chevytrucks.com/vboard/s...d.php?t=523589

07-20-2012, 11:29 AM	#2
too much stuff Roadtrip! Join Date: Feb 2003 Location: Grand Rapids MN Posts: 13,790	Re: small block 400 in blazers None. The only 400 used was in the 2wd trucks and burbs and was actually a big block. (396-402) __________________ 67 gmc custom lwb dakota truck. Sold...And bought back 69 swb 4x4 project (in progress) 70 c-10 lwb texas truck 70 4x4/BB/bkts/posi/tach(retired) 70 swb (wifes) 70 jimmy camper 71 K-5 factory 2wd 71 cheyenne 4x4/tach/posi/ plow rig 71 Cheyenne20 BB, buckets, tach, tilt, 4 speed 72 jimmy CST wyoming rig 72 jimmy Colorado rig 72 lifted texas 4x4 3/4 ton burb 65 fury conv. 383/auto 65 chrysler 300 "L" 413 auto

07-20-2012, 11:53 AM	#4
Firebirdjones Registered User Join Date: Oct 2009 Location: Prescott, Arizona Posts: 2,396	Re: small block 400 in blazers The "400" nomanclature was used on the bigblock trucks up through 72 because GM was too cheap to retool for a new emblem,,,that's what that amounts to Trucks with that emblem (up to 72) actually had a big block 402 in them. GM did the same thing with the car line too, since the 396 already had a following and SS396 sounds catchy (they even wrote a song about it) so a new 402 emblem for 70 was pointless. The 400 sbc that you are referring to harley was also available in trucks and cars. The engine was first introduced in 1970 and was used in the bigger cars like the monte carlo, impala, etc...and it was in pickups both 2x4 and 4x4 throughout the 70's. My neighbor bought a 76 short box 4x4 pickup brand new with a 400 sbc. I don't really remember seeing the 400 sbc much after that but my memory fades with age but I believe the 400 was no longer produced after 76.

07-22-2012, 05:06 AM	#6
Bigb401 Registered User Join Date: Jan 2012 Location: Burlington, wi. Posts: 254	Re: small block 400 in blazers Good info!! Posted via Mobile Device __________________ Proud to be IBEW Local 2150

07-22-2012, 02:09 PM	#7
Scrat Registered User Join Date: Nov 2009 Location: Mesa AZ Posts: 30	Re: small block 400 in blazers My 71 came with a 307, but it's got a 407 in it now (400 sb punched 030 over with flat top pistons) This upgrade tends to make the world a very flat place, if you know what I mean.

07-20-2012, 11:36 AM	#3
fxdxharley Just a nother gear head Join Date: Jul 2009 Location: Barrington NH Posts: 501	Re: small block 400 in blazers guess that answers my other question if they were just in trucks and cars. the cast number says its a small block. #3951511 found it here http://outintheshop.com/faq/casting/castings2.html so if i use it then i will be special!! haha __________________ 2013 HD FLHX 2000 chevy 2500 6.0l 4x4 3dr 2000 harley fxdx 71 Jimmy 4x4- future crawler/ woods rig 71 blazer (C4 2wd conv project) http://67-72chevytrucks.com/vboard/s...d.php?t=523589

07-24-2012, 12:34 PM	#8
fxdxharley Just a nother gear head Join Date: Jul 2009 Location: Barrington NH Posts: 501	Re: small block 400 in blazers thanks for the great info firebird. __________________ 2013 HD FLHX 2000 chevy 2500 6.0l 4x4 3dr 2000 harley fxdx 71 Jimmy 4x4- future crawler/ woods rig 71 blazer (C4 2wd conv project) http://67-72chevytrucks.com/vboard/s...d.php?t=523589



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