SBC Block and Heads ID needed. - Impala Tech
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post #1 of 11 (permalink) Old 02-14-2012, 01:25 PM Thread Starter
 
 
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SBC Block and Heads ID needed.

I have an older 327 and I have found a few different opinions on what it is.
The most recent is my chevy dealer that tells me the block is a 275 hp 1967 that had a glide behind it. No info on the heads.
Not sure how many opinions I will get but here it is.
BlOCK: back cast numbers are 3858180 the front stamped numbers are T0622HC.
HEADS: 3991492 with a date code of J102. These are straight plug double hump heads with factory guide plates.
Thanks for any help. Tim
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post #2 of 11 (permalink) Old 02-14-2012, 03:39 PM
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3858180 is 62-67 327, 250-375HP for both truck and Passenger cars, however 3991492 heads are 69-73 350 that came with the big 2.02/1.60 valves. Unfortunately, I do not gave the combustion chamber size.
I believe that the 3991492 head ware "service only" heads which indicates that the heads were probably GM over-the-counter replacements.
Maybe someone else has more info on this..
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post #3 of 11 (permalink) Old 02-14-2012, 04:58 PM Thread Starter
 
 
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Thanks Bob.
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post #4 of 11 (permalink) Old 02-14-2012, 05:06 PM
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The application number stamped onto the ID plate on the front of the block will tell you how it left the factory. It will be a two letter code on the end of all of the other number and letters.

Most likely it left the factory as a 275 horse 327 (the base or standard motor) in front of a PowerGlide but some one in the past 45 years has rebuilt the original engine so that there is little of the original motor left (probably just the block, crank and rods). Heads definitely where not stock.

I am amazed at the number of people that think they have a rare all original anything as there are so very few cars that were bought and then put into storage for 40 years, just to save them for someone to find and buy for song. Just about everyone I know made a reasonably good living swapping car parts on old Chevys (of course most of my friends were mechanics).

Big Dave
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post #5 of 11 (permalink) Old 02-14-2012, 08:05 PM Thread Starter
 
 
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True,
This engine has been gone through and other parts added. I just wanted to know exactly what it was so I didn't just give it away.
Truth be known about swapping things, I bet you would never guess what I got this out of. Think...Think...Think...

Ok, I pulled this from a 1970 Javelin and it had an M21 4-speed behind it.
Talk about swapping parts. LOL Thanks
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post #6 of 11 (permalink) Old 02-14-2012, 08:16 PM
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Not that unusual actually. AMC bought the rights to use a SBC in their cars but rather than actually copy the parts they recycled a lot of the technology, but in their own parts. They used a Chevy bolt pattern for the bell housing so all Chevy trannies will bolt up in a AMC as if it grew there. They also sold a lot of Jeeps with TH400 transmissions installed in them. AMC also used Harrison radiators and Saginaw power steering as well as Delco-Remy alternators.

Big Dave
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post #7 of 11 (permalink) Old 02-14-2012, 08:23 PM Thread Starter
 
 
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Quote:
Originally Posted by Big Dave View Post
Not that unusual actually. AMC bought the rights to use a SBC in their cars but rather than actually copy the parts they recycled a lot of the technology, but in their own parts. They used a Chevy bolt pattern for the bell housing so all Chevy trannies will bolt up in a AMC as if it grew there. They also sold a lot of Jeeps with TH400 transmissions installed in them. AMC also used Harrison radiators and Saginaw power steering as well as Delco-Remy alternators.

Big Dave
Radiators,PS boxes,Alt's and points distributor. Yes
The tranny patterns are AMC only and the Jeeps up to 79 had TH400 but they have an AMC bolt pattern. The later Jeeps have a Chrysler trans.
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post #8 of 11 (permalink) Old 02-14-2012, 09:08 PM
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Tim,
Your "HC" suffix code is unique identifier of your engine block.

"BlOCK: back cast numbers are 3858180 the front stamped numbers are T0622HC."


This one was born as a 1967 327/275hp that was installed into a full size chevrolet (not a truck) and was attached to a powerglide transmission. Assembled at the Tonowonda factory on June 22 1967.
This engine was originally fitted with 3890462 heads (double humps)
Rochester Q-jet and 2" rams horns exhaust manifolds

64 Impala SS 327/300 survivor
67 Impala SS 327 triple black hardtop
67 Impala Bench Seat 4 speed
http://craigaacars.shutterfly.com/pictures

Last edited by Fossil_Fuel; 02-15-2012 at 03:41 PM.
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post #9 of 11 (permalink) Old 02-15-2012, 05:21 AM Thread Starter
 
 
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Great info. Thanks
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post #10 of 11 (permalink) Old 02-17-2012, 07:46 PM
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What was the M21 originally out of?
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post #11 of 11 (permalink) Old 02-18-2012, 12:19 PM Thread Starter
 
 
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Quote:
Originally Posted by TAR6569 View Post
What was the M21 originally out of?
Not Sure. I sold it about 6 years ago and all the info I had is gone.
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