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Old 03-25-2002, 04:50 PM   #1
gregbr
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Join Date: Mar 2002
Location: Rock Hill, SC USA
Posts: 1,214
Post 70 big block 396 or 402?

I have a 70 GMC 1500, with a factory big block, numbers match. Is there an easy way to tell if this thing is a 396 or a 402? The glove box says 396, the build sheet says 400, the GMC place says 396, and all the books say 396/402 for that code. Engine is stamped/embossed T1117TBG & 3969854, these numbers are on the build sheet also. Does anyone know the true horsepower, GMC says it's 310HP, but nobody has a air cleaner sticker for that. HELP!!

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Thanks, Greg

51 Chevy Longbed
54 Chevy Panel Truck
70 GMC Shortbed Big Block
88 Chevy K1500 Lifted 6"
__________________
67 Chevy, Small back glass, Factory 4WD, Factory Shortbed, Factory V8, Lifted 4"
70 GMC Sierra Grande, Factory Shortbed, Factory 402/400 turbo, Super Custom Interior. Numbers matching with SPID & Build Sheet. 68K Original Miles. Restored 2010

70 GMC Restoration Pictures
http://67-72chevytrucks.com/gallery/...00&ppuser=4424
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