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bobatwarsaw
December 5th, 2017, 12:52 AM
Hi all
I got this 1966 s/w in Oklahoma just to haul off. its suppose
have run last year. after the 1st of the year I'm going to
apply for a texas bonded title, since all I have is a bill of
sale. then after I am done with the project I have going
now, I will start on it, that's when I will have a lot of questions
Ed Snyder
December 5th, 2017, 02:19 AM
Hi all
I got this 1966 s/w in Oklahoma just to haul off. its suppose
have run last year.

Nice find! Looks pretty straight and rust-free. Is that a 305 or a 351?
bobatwarsaw
December 5th, 2017, 03:55 AM
I don't know, i don't know nothing about
gmc engines. I was hopeing that the
picture of the engine, that someone tell
me
Funky61
December 5th, 2017, 04:40 AM
Check here Bobatwarsaw to see what you have! Welcome aboard.

http://6066gmcguy.com/EngineData.html
Ed Snyder
December 5th, 2017, 05:27 AM
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.
bobatwarsaw
December 5th, 2017, 05:34 AM
Thanks everyone for the info
TJ's GMC
December 15th, 2017, 06:57 AM
Nice find!
bigblockv6
December 16th, 2017, 03:46 AM
Nice find! Looks pretty straight and rust-free. Is that a 305 or a 351?

Judging by the exhaust manifolds and the ww carb it's appears to be a 305.
jbgroby
December 18th, 2017, 08:10 PM
FYI, you also have a rare factory RPM gauge, DO NOT PART with that.
bobatwarsaw
December 20th, 2017, 12:24 AM
hi jbgroby
I am not doubting your word at all, but can you tell
me how you know that the tack is factory, so I can
start learning how to id the factory parts that was
offered
thanks bob
Funky61
December 20th, 2017, 06:14 AM
Bobatwarsaw; this link says the factory/accessory tach should be a 5K and not a 6K unit. So I don't think it's "correct" but still a nice addition especially if it does not require the transmitter box.

http://6066gmcguy.com/cluster.html


...and another link about the cluster I got off EBay. Look at the different fonts used and I think the 5K numbers have a slight green tint.

http://6066gmcclub.com/showthread.php?t=48609