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#1 |
Registered User
Join Date: Jul 2009
Location: Miami, FL
Posts: 85
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still not sure if 305 or 350
I have every reason to believe my engine the original 305.. But my mechanic keeps insisting that not the original engine on the truck and thinks it might be a 350.
I can't seem to find the stamp. The only stamp I see on the engine is this one. ![]() Other pictures to the truck. http://picasaweb.google.com/cyberpine/1987C10# Right now it runs way strong, but seems to stall or flood going from 0 to 20. They've changed the TBI gasket and sealed any air intake leaks. changed the Gas pump and filter. He wants to pull the intake and TB.
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----------------- JC (Cyberpine) My 1987 C10 Short Bed (click on slideshow to see full album) |
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#2 |
Getting Old; Going Broke
Join Date: Apr 2010
Location: Owasso OK
Posts: 2,764
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Re: still not sure if 305 of 350
Pretty sure I see the oil fill on the right .... Tells me 305 just looking. But, I'm a worthless mechanic. I can tear stuff up like a pro though.
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Why is every used 350 sbc out of a corvette? There's only two things that excite a man, expensive toys and real expensive toys. VEGETARIAN: That's an old Indian word meaning "I don't hunt so good." When the going gets tough, switch to power tools. |
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#3 |
Next project: 1970 K10
Join Date: Feb 2004
Location: Fort Collins, Colo 80524
Posts: 6,685
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Re: still not sure if 305 of 350
Look at the front of the engine, right under the front of the passenger side head. There is a pad there that should have a bunch of letters and numbers stamped there. What are they?
If there are no letters and numbers there, are there a bunch of semi-circular marks? Like ))))))))))
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Bob 1970 Chevy K10 LWB "Goldie" 350/TH350 next project!! 1981 Chevy C10 LWB 355/TH350 - My son's truck LS SWAP FORUM! Tons of LS swap info here! PLEASE CLICK HERE TO SUPPORT THE GREATEST BOARD ON THE NET! CLICK HERE FOR THE FAQ INDEX by KRUE |
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#4 |
Registered User
Join Date: Jul 2009
Location: Miami, FL
Posts: 85
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Re: still not sure if 305 or 350
Front - as in closer to the front bumper? More visible from the top or the bottom?
Thanks.
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----------------- JC (Cyberpine) My 1987 C10 Short Bed (click on slideshow to see full album) |
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#5 |
Next project: 1970 K10
Join Date: Feb 2004
Location: Fort Collins, Colo 80524
Posts: 6,685
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Re: still not sure if 305 or 350
Bumper?? Front of the engine - as in, the front of the engine.
White circle: ![]() ![]()
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Bob 1970 Chevy K10 LWB "Goldie" 350/TH350 next project!! 1981 Chevy C10 LWB 355/TH350 - My son's truck LS SWAP FORUM! Tons of LS swap info here! PLEASE CLICK HERE TO SUPPORT THE GREATEST BOARD ON THE NET! CLICK HERE FOR THE FAQ INDEX by KRUE |
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#6 |
Registered User
Join Date: May 2010
Location: laurel hill Fl
Posts: 645
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Re: still not sure if 305 or 350
one trick i learned. 305 has oil filler on the left 350 has it on the right.
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1985 C10 Custom Deluxe LWB 305/700r4 [ Goldfinger ] ![]() 1999 k3500 crew cab dually 6.5tdi/4l80e |
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#7 | |
Registered User
Join Date: Jul 2009
Location: West Jefferson, OH
Posts: 999
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Re: still not sure if 305 or 350
Quote:
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-Andy '77 K5 Blazer '78 K10 Shortbed '78 C20 Suburban '79 K30 Crew Cab Dually '84 C10 Short Stepside '88 K20 Suburban ![]() |
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#8 |
Registered User
Join Date: Nov 2008
Location: Lusby, MD
Posts: 563
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Re: still not sure if 305 or 350
i looked at your motor pics and I 90% sure it's the original motor possible 305 HO but it's a 350 just by looking at it also the numbers will be under you altinator.......my .02
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http://67-72chevytrucks.com/vboard/group.php?groupid=37 73 C10 Fleetside ![]() If it ain't a Chevy it's foreign ![]() http://hotridesmag.com/ |
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#9 |
Registered User
Join Date: Aug 2009
Location: Lambertville MI
Posts: 962
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Re: still not sure if 305 or 350
your timing tab is set a little off to the side. if it were a 305 it should be straight down behind the center of the water pump.. i think.. check this
http://www.mortec.com/location.htm
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"I'll keep my guns, money, and freedom. You can keep the "change" |
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#10 |
Registered User
Join Date: Sep 2009
Location: Van Buren, AR
Posts: 321
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Re: still not sure if 305 or 350
since its a tbi its a 1 pc seal the new motors the 350s the dipstick is on the passenger side on the back of the motor on the lip by where the oil pressure line hooks up there should be a stamp of 5.0 or 5.7
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![]() ![]() '82 ![]() (Hot Rod) '90 ![]() (Daily Driver) '53 m38a1 Willys Jeep (Toy) |
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#11 |
GM Addicted
Join Date: Jan 2009
Location: Visalia, Ca
Posts: 2,294
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Re: still not sure if 305 or 350
Try the vin behind the driver side head. Itll be on the block where the transmission bolts up. You will see it. Give this webiste a look i use this site for all my casting numbers
mortec.com
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![]() ![]() 73 GMC, 54 Caddy, 2010 Silverado, 68 C10 RIP DAd My 73 GMC Truck Build Pic 2010 Silverado 4/6 on 24s IG:MacsGarage Last edited by 54Caddy; 05-26-2010 at 04:30 PM. |
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#12 |
Registered User
Join Date: Jan 2010
Location: Jacksonville Florida
Posts: 234
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Re: still not sure if 305 or 350
Get a better mechanic, he'll tell you lol.
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Jesse. ![]() |
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#13 |
Registered User
Join Date: Jun 2009
Location: Lubbock, TX
Posts: 1,671
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Re: still not sure if 305 or 350
what side is the dipstick on? if its on the passenger it will be a 305 unless its a newer vortec engine...
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2006 GMC Sierra CCSB, 6.0 swap 2000 Chevy C3500 Crew Cab shortbed dually 1999 Chevy c2500 Crew Cab shortbed 1982 El Camino 350/350 1979 K5 2wd blazer bagged/bodied 1986 Monte Carlo SS 1991 Chevy CK SWB-67 clip and tailgate, bagged 350/700r4 1955 Chevy Bel Air 2014 Chevy Silverado ccsb |
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#14 |
Registered User
Join Date: Feb 2010
Location: Murfreesboro Tennessee
Posts: 129
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Re: still not sure if 305 or 350
Look on the block behind the driver side cylinder head there will be a number there...that is the casting number...look that number up and it will tell you what it is.
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#15 |
Registered User
Join Date: Nov 2006
Location: Marietta, OK
Posts: 153
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Re: still not sure if 305 or 350
Both 350's and 305"s can have the passenger dipstick... The real oddball is the service replacement block that has the holes to mount a dipstick on each side. One trick I have used in the past is looking at the rear-most exhaust bolt on the passenger side manifold. Most 80's GM have two holes behind the number 8 cylinder. Bolt through the forward hole means 305, rear hole means 350.
If that fails, check the cast-in numbers behind the driver-side head. That is the casting number which most books refer to. The last three digits of that number will often be cast in the walls of the block, between the freezeplugs. You can also pull a valvecover and check the casting numbers between the rocker arms. Very few people put the 305 heads on the 350's anymore looking for more compression. If that fails, pull a head... 4" bore means 350, approx 3 3/4" bore means 305 and you are 1/3 of the way towards pulling the entire 305 out and selling it for $30 scrap iron. |
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#16 | |
Registered User
Join Date: Jul 2009
Location: West Jefferson, OH
Posts: 999
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Re: still not sure if 305 or 350
Quote:
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-Andy '77 K5 Blazer '78 K10 Shortbed '78 C20 Suburban '79 K30 Crew Cab Dually '84 C10 Short Stepside '88 K20 Suburban ![]() |
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#17 |
Registered User
Join Date: Aug 2009
Location: Lambertville MI
Posts: 962
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Re: still not sure if 305 or 350
true.. my 83 has a passenger dipstick and my 70s has it on the drivers side.. i know for sure both are 350s
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"I'll keep my guns, money, and freedom. You can keep the "change" |
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