Can someone decode a block for me? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

hugger6933 · 10-14-2011, 04:06 PM

I got a 70 swb truck in a couple of weeks ago and was told that it has a 327 in it. I offered in correction 307? the truck has a pretty small spid no brakes or power steering, no air noof everything. Imade the assumption that it would be the 307. They assured me it was a 327. I bought ot from the local school district and supposedly the man that drove it was the only one allowed to do so and he was in charde. When the 327's were being phased out in the gererals inventory they purchased one for this truck. ans with just a few years left they installed it for him. He drove it till the day he retired and then they parked it till I bought it. That is the story sorry to ramble as I often do but the numbers are VOT23YH. Any help in decoding would help me figure out witch cam may be best for me and what not. Jim

webfoot · 10-14-2011, 04:21 PM

Is that the number stamped on the pad up by the head? If so that is specific to the vehicle it came in. Need the block casting number.

shawno72 · 10-14-2011, 04:24 PM

GASoline71 · 10-14-2011, 04:24 PM

Suffix code "YH" comes out to a 327 used in either 1966 or 1967 C10 - C30 trucks.

Gary

shawno72 · 10-14-2011, 04:26 PM

Score

webfoot · 10-14-2011, 04:28 PM

I just found the list of suffix codes, didn't know until now that you can get info from those. Good to know!

GASoline71 · 10-14-2011, 04:35 PM

This is one of the better sites to find suffix codes.

http://www.nastyz28.com/chevy-engine-code-stampings.php

Gary

bruceman1968 · 10-14-2011, 05:05 PM

It could also be a 1968 327. To find out year it is we need the date code off the block....

EDIT It could also be a 1965

hugger6933 · 10-14-2011, 05:36 PM

I will pull a valve cover to get the head casting number, and try to dig out some of the oily muck on the rear pad to get the clock readings and the casting numbers.

hugger6933 · 10-14-2011, 05:37 PM

does anyone know the horsepower ratings for that 327?

bruceman1968 · 10-14-2011, 05:49 PM

hugger, we don't know which 327 you have till we get that date code. It should be at the back of the block.
1965 YH 327 is 185hp
1966 YH 327 is 220hp
1967 YH 327 is 220hp
1968 YH 327 is 240hp

oldskydog · 10-16-2011, 03:54 PM

The "V" prefix in the asembly stamping narrows it down to 67 or later.

10-14-2011, 04:06 PM	#1
hugger6933 Registered User Join Date: Oct 2008 Location: Marianna Arkansas Posts: 7,280	Can someone decode a block for me? I got a 70 swb truck in a couple of weeks ago and was told that it has a 327 in it. I offered in correction 307? the truck has a pretty small spid no brakes or power steering, no air noof everything. Imade the assumption that it would be the 307. They assured me it was a 327. I bought ot from the local school district and supposedly the man that drove it was the only one allowed to do so and he was in charde. When the 327's were being phased out in the gererals inventory they purchased one for this truck. ans with just a few years left they installed it for him. He drove it till the day he retired and then they parked it till I bought it. That is the story sorry to ramble as I often do but the numbers are VOT23YH. Any help in decoding would help me figure out witch cam may be best for me and what not. Jim

10-14-2011, 04:21 PM	#2
webfoot Registered User Join Date: Nov 2007 Location: Hermiston, OR Posts: 947	Re: Can someone decode a block for me? Is that the number stamped on the pad up by the head? If so that is specific to the vehicle it came in. Need the block casting number. __________________ *Running in place gets you nowhere fast.* -me 1968 GTO 4-spd covnvertible 1970 K-20 4-speed, factory AC.

10-14-2011, 04:24 PM	#3
shawno72 C/10 junkie Join Date: Nov 2010 Location: Stockton Ca Posts: 9,093	Re: Can someone decode a block for me? __________________ Shawn 70 LWB C10 current driver/project http://67-72chevytrucks.com/vboard/s...d.php?t=663051 68 SWB C10 Work in progress.....SOLD http://67-72chevytrucks.com/vboard/s...d.php?t=559520 72 LWB C10 Sold 71 LWB C10 Sold 68 LWB C10 CST Sold http://youtu.be/kbB0QrBIs9k My mom always had the best advice. It was just a tad late. After a fall that involved blood, she'd say....."Careful!"

10-14-2011, 04:26 PM	#5
shawno72 C/10 junkie Join Date: Nov 2010 Location: Stockton Ca Posts: 9,093	Re: Can someone decode a block for me? Score __________________ Shawn 70 LWB C10 current driver/project http://67-72chevytrucks.com/vboard/s...d.php?t=663051 68 SWB C10 Work in progress.....SOLD http://67-72chevytrucks.com/vboard/s...d.php?t=559520 72 LWB C10 Sold 71 LWB C10 Sold 68 LWB C10 CST Sold http://youtu.be/kbB0QrBIs9k My mom always had the best advice. It was just a tad late. After a fall that involved blood, she'd say....."Careful!"

10-14-2011, 04:28 PM	#6
webfoot Registered User Join Date: Nov 2007 Location: Hermiston, OR Posts: 947	Re: Can someone decode a block for me? I just found the list of suffix codes, didn't know until now that you can get info from those. Good to know! __________________ *Running in place gets you nowhere fast.* -me 1968 GTO 4-spd covnvertible 1970 K-20 4-speed, factory AC.

10-14-2011, 05:05 PM	#8
bruceman1968 Registered User Join Date: Oct 2009 Location: Tampa Bay Posts: 1,549	Re: Can someone decode a block for me? It could also be a 1968 327. To find out year it is we need the date code off the block.... EDIT It could also be a 1965 __________________ CHEVY/GMC VIN DECODERS Last edited by bruceman1968; 10-14-2011 at 05:51 PM.

10-14-2011, 05:36 PM	#9
hugger6933 Registered User Join Date: Oct 2008 Location: Marianna Arkansas Posts: 7,280	Re: Can someone decode a block for me? I will pull a valve cover to get the head casting number, and try to dig out some of the oily muck on the rear pad to get the clock readings and the casting numbers.

10-14-2011, 05:37 PM	#10
hugger6933 Registered User Join Date: Oct 2008 Location: Marianna Arkansas Posts: 7,280	Re: Can someone decode a block for me? does anyone know the horsepower ratings for that 327?

10-14-2011, 05:49 PM	#11
bruceman1968 Registered User Join Date: Oct 2009 Location: Tampa Bay Posts: 1,549	Re: Can someone decode a block for me? hugger, we don't know which 327 you have till we get that date code. It should be at the back of the block. 1965 YH 327 is 185hp 1966 YH 327 is 220hp 1967 YH 327 is 220hp 1968 YH 327 is 240hp __________________ CHEVY/GMC VIN DECODERS Last edited by bruceman1968; 10-14-2011 at 05:50 PM. Reason: spelling

10-16-2011, 03:54 PM	#12
oldskydog Registered User Join Date: Aug 2011 Location: Mesa, Az Posts: 50	Re: Can someone decode a block for me? The "V" prefix in the asembly stamping narrows it down to 67 or later.



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