Thread: 1966 gmc s/w
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Old December 5th, 2017, 05:27 AM
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Ed Snyder Ed Snyder is offline
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Default Re: 1966 gmc s/w

Quote:
Originally Posted by Funky61 View Post
Check here Bobatwarsaw to see what you have! Welcome aboard.

http://6066gmcguy.com/EngineData.html
Besides the number stamped on top of the block in front of the passenger side cylinder head (which oftentimes is obscured by paint or grime), a quick way to tell is by the bolt pattern at the base of the carburetor. If it's rectangular, it's probably a 305. If it's trapezoidal, it's probably a 351.
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Ed Snyder
Medford, Oregon
1962 1000 Pickup 401M & Muncie 318 with overdrive
1962 K1000 Suburban 401M & SM420
1965 2500 Suburban 351C & SM420 with Watson overdrive
1967 CM1500 pickup 351E & NP435
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