What is my Engine? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**LostMy65** · 10-07-2017, 08:13 PM

From the number 3896944 I deduced it is a 283.
Does the other casting tell us the date?

**LostMy65** · 10-07-2017, 08:22 PM

Doing more research on this site:
http://chevellestuff.net/qd/block_casting_by_year.htm

3896944 1967 283 195 Tonawanda cast block was used only for the 1967 model year and was the last 283 design.

.
Maybe my block was cast July 1966 and then used in a 1967 vehicle?

Alex V. · 10-07-2017, 09:41 PM

The casting date is in the second pic - is it C76? That should translate to March 7th of '66.

**LostMy65** · 10-08-2017, 12:37 AM

Quote:

Originally Posted by Alex V.

The casting date is in the second pic - is it C76? That should translate to March 7th of '66.

Yes, I'm pretty sure now that it was cast in 66. The part that was confusing me was most sites were putting the 3896944 as a 1967 engine, but because it's either G76 or C76 it must have been put in a 67 that was built in 66. Kinda like my 2010 CRV I bought in 2009.

Alex V. · 10-08-2017, 09:17 PM

March of '66 is pretty early to be correct for a '67. July is probably possible but someone sharper on such things than me will have to confirm.

**Captainfab** · 10-08-2017, 10:59 PM

The casting date is just that, the day it was cast. That does not mean that it was machined and assembled right away. Whether it is a '66 or a '67 makes no difference IMO.

**LostMy65** · 10-09-2017, 09:14 AM

Quote:

Originally Posted by Captainfab

The casting date is just that, the day it was cast. That does not mean that it was machined and assembled right away. Whether it is a '66 or a '67 makes no difference IMO.

Quote:

Originally Posted by Alex V.

March of '66 is pretty early to be correct for a '67. July is probably possible but someone sharper on such things than me will have to confirm.

What I do gather from all this is the motor isn't the one my 65 would have originally came with.

**Captainfab** · 10-09-2017, 10:40 PM

You are wanting a '65 283 because?????

Quote:

Originally Posted by LostMy65

What I do gather from all this is the motor isn't the one my 65 would have originally came with.

**LostMy65** · 10-09-2017, 11:12 PM

Quote:

Originally Posted by Captainfab

You are wanting a '65 283 because?????

No, just was curious if what I have is the original engine that came with my 65.
I see now it's not.

**LostMy65** · 10-09-2017, 10:34 PM

I found this while searching for head casting numbers:
http://www.mortec.com/castnum.htm

AcampoDave · 07-04-2022, 06:03 PM

Not just any 305 heads. The 416 heads are off the high output motor. They are the ones you want. I use them myself on the 283 in my '66.

**LostMy65** · 07-04-2022, 07:46 PM

Quote:

Originally Posted by AcampoDave

Not just any 305 heads. The 416 heads are off the high output motor. They are the ones you want. I use them myself on the 283 in my '66.

Thanks

10-07-2017, 08:13 PM	#1
LostMy65 But Found Her 25yrs Later! Join Date: Oct 2010 Location: Oregon City, Oregon Posts: 10,460	What is my Engine? From the number 3896944 I deduced it is a 283. Does the other casting tell us the date? Attached Images __________________ I lost my 65 - Found it 25 years later: http://67-72chevytrucks.com/vboard/s...d.php?t=426650 66 C20 Service Truck: http://67-72chevytrucks.com/vboard/s...d.php?t=428035

10-07-2017, 08:22 PM	#2
LostMy65 But Found Her 25yrs Later! Join Date: Oct 2010 Location: Oregon City, Oregon Posts: 10,460	Re: What is my Engine? Doing more research on this site: http://chevellestuff.net/qd/block_casting_by_year.htm 3896944 1967 283 195 Tonawanda cast block was used only for the 1967 model year and was the last 283 design. . Maybe my block was cast July 1966 and then used in a 1967 vehicle? __________________ I lost my 65 - Found it 25 years later: http://67-72chevytrucks.com/vboard/s...d.php?t=426650 66 C20 Service Truck: http://67-72chevytrucks.com/vboard/s...d.php?t=428035

10-07-2017, 09:41 PM	#3
Alex V. Registered User Join Date: Mar 2013 Location: Campbellsville, KY Posts: 888	Re: What is my Engine? The casting date is in the second pic - is it C76? That should translate to March 7th of '66. __________________ Alex V. ------ 1967 C10 Suburban, 350/NP435, Green/Green, PS, PB, HD cooling, charging, shocks, and springs. 1985 GMC C3500 SRW, Sierra Classic, 454/TH400, white/blue.

10-08-2017, 09:17 PM	#5
Alex V. Registered User Join Date: Mar 2013 Location: Campbellsville, KY Posts: 888	Re: What is my Engine? March of '66 is pretty early to be correct for a '67. July is probably possible but someone sharper on such things than me will have to confirm. __________________ Alex V. ------ 1967 C10 Suburban, 350/NP435, Green/Green, PS, PB, HD cooling, charging, shocks, and springs. 1985 GMC C3500 SRW, Sierra Classic, 454/TH400, white/blue.

10-08-2017, 10:59 PM	#6
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,246	Re: What is my Engine? The casting date is just that, the day it was cast. That does not mean that it was machined and assembled right away. Whether it is a '66 or a '67 makes no difference IMO. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

10-09-2017, 10:34 PM	#10
LostMy65 But Found Her 25yrs Later! Join Date: Oct 2010 Location: Oregon City, Oregon Posts: 10,460	Re: What is my Engine? I found this while searching for head casting numbers: http://www.mortec.com/castnum.htm __________________ I lost my 65 - Found it 25 years later: http://67-72chevytrucks.com/vboard/s...d.php?t=426650 66 C20 Service Truck: http://67-72chevytrucks.com/vboard/s...d.php?t=428035

07-04-2022, 06:03 PM	#11
AcampoDave Registered User Join Date: Feb 2013 Location: central California Posts: 2,726	Re: What is my Engine? Not just any 305 heads. The 416 heads are off the high output motor. They are the ones you want. I use them myself on the 283 in my '66.

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