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S
Standard Member
Send PMVACAVILLE, CA - USA
Joined: 12/19/2021
Posts: 16
Vette(s): 1968 Silverstone Sport Coupe
Hi all:
I know the car has a replacement engine. Can any of you use a chart or whathaveyou to id this engine (specifictly year and model car it is from).
I seem to recall trying to look it up before, but got too confused.
I believe it to be a factory replacement 327.
On the positive side, it does have double hump heads and car is pre 1973 in CA, meaning no smog checks on it. Thanks in advance!
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m
Lifetime Member
Send PMEquinunk, PA - USA
Joined: 10/31/2007
Posts: 2637
Vette(s): 1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.
Well, I'm not good with the embossed system, but the double hump heads are the good ones. Possibly 275 HP, and possibly 202 valves.
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S
Standard Member
Send PMVACAVILLE, CA - USA
Joined: 12/19/2021
Posts: 16
Vette(s): 1968 Silverstone Sport Coupe
Well heck, it’s supposed to be a 300 hp car. I’m hoping (not realistically) that it will be the 350 hp car, but my guess is 2 bolt main 327 with 300 hp.
I do think that it is an ‘older’ block that was built into an exchange engine.
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m
Lifetime Member
Send PMEquinunk, PA - USA
Joined: 10/31/2007
Posts: 2637
Vette(s): 1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.
It very well could be. There were a few made. I'm relatively sure in 66' they were 275.
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S
Standard Member
Send PMVACAVILLE, CA - USA
Joined: 12/19/2021
Posts: 16
Vette(s): 1968 Silverstone Sport Coupe
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 22765
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
Am-Fm/map light National/Regional/Chapter NCRS "Top Flight"
#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
It is a GM/Chevrolet replacement engine.
CE: Chevrolet Engine/Corporate Engineering
4: Year. Likely '64 in this case
N: Norwood California Assembly plant.
33: Batch, or sequence # for the run of engines built at that time.
XCB indicates 327 CI engine used as a replacement, NOT a factory installed engine.
S0320 indicates a Saginaw casting, built March 20th.
Edited 6/28/2026 9:26:03 PM (AZT)
Joel Adams
C3VR Lifetime Member #56 
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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S
Standard Member
Send PMVACAVILLE, CA - USA
Joined: 12/19/2021
Posts: 16
Vette(s): 1968 Silverstone Sport Coupe
Thanks. I now (kinda) know what I’m dealing with.
BTW, this all started when I noticed that the left valve cover has no hole in it. The AIR system has been removed, so I guess a new valve cover is in my future so a PCV valve can be put in.
It already/still has the line that goes to air cleaner housing.
I guess this is a good explanation of idle problems due to open port in carb.
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Is that the casting date on the back, right side of the engine B144. That would be the 14th of the month (B) of 1964. Maybe?
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in Forum: C3 Engines, Driveline and Handling
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