Hi,

Just bought a 1968 Vette (NOM)and found the engine number which is a 327CI EI 3858174 which i believe is a 1966 Corvette engine. The other number on the front of the block is F0426HCH. What does the HCH stand for? Just trying to verify the Horse power. Can anybody help?

Thanks
Rod

sofarvettec3 said: Hi, Just bought a 1968 Vette (NOM)and found the engine number which is a 327CI EI 3858174 which i believe is a 1966 Corvette engine. The other number on the front of the block is F0426HCH. What does the HCH stand for? Just trying to verify the Horse power. Can anybody help? Thanks Rod

I can't find the HCH suffix in my corvette numbers book, however the book does say the 3858174 casting # is considered a "mystery motor" used as early as 64 in 300 plus applications and commercial trucks.
It's a 2 bolt with a 300 and 350 hose application.
Source book; Corvette, by the numbers, by Alvin Colvin.
It's a bit vague, but doesn't rule out it being a vette motor, at least not by the casting #

Well, I,m pretty sure so far that the 1967 Corvette came out with two 327 CI engines, a 350 and 300 HP with that casting number. Which mine is most likely the 300 HP. I can see that the F=Flint 04=Month 26=Day or is it 2=Day and 6=Year(1966). I've been all over the net trying to figure out the HCH. I appreciate your response.

everyone seems to pretty much agree on the block date on 62-67
but in those years all engine codes were 2 digit and i cant find no mention of a HCH code at all..

there is a CH but it doesnt match the casting number..

and HC code says
1965 HC 327 Powerglide . 275hp 4 full size
http://www.minuit10.net/engine-code.htm

http://www.teufert.net/sbchevy/sb-cast.htm
says

3858174
62 - 67
350, 327 & 302
210-350
2-Bolt mains/Truck/Pass


another source says

3858174
327
64-67
Pas, Chevelle, Camaro
Small Journal

3858174
327
64-67
Truck
Small Journal

3858174
327
66
Corvette
300,350 HP Small Journal

3858174
350
67
Camaro



plus i thought all corvette engines from that era came from the "t" plant.. tonawanda or soemthing like that.

|UPDATED|7/30/2004 7:58:53 PM (AZT)|/UPDATED|

sofarvettec3 said: I can see that the F=Flint 04=Month 26=Day or is it 2=Day and 6=Year(1966). I've been all over the net trying to figure out the HCH. I appreciate your response.

it is april 26th..

the year is figured by engine code

my guess.. is that it should be HC not HCH..

HC is consistent with date format and casting

327/275hp

Well, i guess i'll keep researching it. The appraiser at Classic Cars of New England took this number and came up with 327 CI 300 HP engine. This is also a standard 4 speed muncie transmission. Guess i'll give them a call.

http://www.classiccarsofne.com/directions_map.htm

in my black book the 3858174 says for most 327 ci in 1966
might the HCH be for the Holley carburetor?

|UPDATED|7/30/2004 6:18:09 PM (AZT)|/UPDATED|

Well, it does have a Holley with the Edelbrock Intake. I ordered the Black Book for 1953 to 2004 and the Corvette by Numbers to check it out. I do appreciate your input. What i have read so far on the net and this in certain circumstances, some of the earlier engines did have a 3 suffix code, tho' i haven't found any yet accept for the big blocks.

sofarvettec3 said: some of the earlier engines did have a 3 suffix code, tho' i haven't found any yet accept for the big blocks.

i couldnt find any in the 60's

some in the fifties and seventies.. but all the 60's i found were 2 digit

66 engine codes

HE . 327 .300 . Manual Trans.
HH . 327 ..300 .. K19 & ManualTrans.
HO . 327 .300 . Powerglide
HR ..327 ..300 .. K19 & Powerglide
HT . 327...350 .. Hi-LiftCam & 4-Speed
HD . 327..350 .. Hi-Lift Cam, K19 & 4-Speed
HP . 327...350... Hi-Lift Cam, A/C, P/S & 4-Speed
KH .327...350... Hi-Lift Cam, K19, AJC, P/S, 4-Speed
IL .. 427...390... Special Cam, Hyd. Lifters & 4-Speed
IM . 427..390 .. Special Cam, Hyd. Lifters, K19,4-Spd
IQ . 427 ..390 ...Special Cam, Hyd. Lifters, Powerglide*
IR . 427 ..390 ...Special Cam, Hyd. Lifters, K19, Prgld*
IP . 427 ..425 .. Special Cam, Mech. Lifters & 4-Speed
IK . 427..425 .. Special Cam, Mech. Lifters, M22 4-Spd
Note: L79 engines have hydraulic lifters. K19 is Air Inject
ion Reactor equipment; AIC means Air Conditioning; P/S
means Power Steering (N40); M22 = Heavy-Duty 4-Spd
Transmission. All engines use Holley 4-barrel carburetion.
Unlisted 1966 codes "IT' (heavy-duty 425 HP) and "IU"
(425 HP w/Alum Heads). (*)390 HP w/Auto also added.

http://www.rowleycorvette.com/stats66.html

|UPDATED|7/30/2004 8:19:44 PM (AZT)|/UPDATED|