Topic: 1973 identification help
in Forum: C3 General Discussion
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Hi,
I bought a 73 coupe in pieces for my son and I to restore. I've been trying to find out what we really bought! lol.
Maybe you can help. Here is what I've found
Owner said it was all original and it looks to be.
Vin: 1Z37t3s (followed by production sequence)
This tells me it was built in 73 and should have an L82
Engine: 3956618
From what I have found this would be an engine from 1969?
It also has TO618HC on the front of the block - I can't find a reference for this anywhere
The plate by the shifter says 300hp with 10.25.1 Comp Ratio
Intake Manifold: 3919803
Bell housing: 3899021
Transmission: 335308 and P3CO6A and 13S417616
P tells me it's a Munci. Also it has 7 bolts on inspection plate and cast AL
Also the numbers match the VIN
Rear End: 3899143
Sticker says use only limited slip fluid. I've not researched this so not sure what ratio is etc.
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Casting # 3956618 was used on '68-'69 302/327/350 engines.
T0618HC- T=Tonawanda engine, 06=June, 18=day
Intake casting #3919803 was used on '67-'68 327/350 engines.
Are you sure that the bell housing # is 3899021 and not 3899621?
The rear end code should be stamped on the bottom of the differential between the spring plate and the bracket that hold the strut rods.
AA=3.55
AB=3.70
AC=4.11
AW=3.08
AX=3.36
LR=3.36
Can you pull a Valve cover off and see what the casting #'s are?
GEN III 5.7L "LS6" Engine swap
TKO500 5 spd.
3.54 Dana 44
'69 "N11" Sidepipes
Borgeson Steering Box
Born 8/1981
Sequence #3975
Click here to see more pics of my Vette on CarDomain.
Lifetime Member #26
Borgeson Steering Box
Born 8/1981
Sequence #3975
Click here to see more pics of my Vette on CarDomain.
Lifetime Member #26
20152515373r.jpg)
Hey Robb, welcome to C3VR, glad to have another '73 on the site. You're also relatively close by, I live in Gig Harbor, just up and around the corner from Kent.
Here's a little more break down on your tranny:
P = Muncie 4 speed
3 = 1973 production year
C06 = March 6th production date
A = M20 - std. wide ratio 4 speed
One of the best sources for Muncie info I found @ members.tripod.com/camaro_obsession/muncie.htm
Post some pics when you get a chance, good luck with the car.
John Sigmund
valkman57@sbcglobal.net
NCRS Member 61302
NW NCRS Chapter Member
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Lifetime MemberModerator
Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20224
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
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#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
Well CRAP! I just put all this info in a post, and it disappeared!!
Anyway...John gave the trans info that I tried to post, but to expand on the engine code, HC, it's for a '69, 250hp, 2bbl, manual trans, A/F/X car(A=Chevelle/GTO/Cutlass F=Camaro/Fireturd X= Nova). NOT the original engine for the car.
The data plate has also been changed. The '73 L82 was 250hp/285ft/lbs, 9.0cr.
The trans stamp shows it to be a March 6th build, which is perfect for the body build date, which should be March 14th '73. Check your TRIM TAG for the build date to verify.
Anyway...John gave the trans info that I tried to post, but to expand on the engine code, HC, it's for a '69, 250hp, 2bbl, manual trans, A/F/X car(A=Chevelle/GTO/Cutlass F=Camaro/Fireturd X= Nova). NOT the original engine for the car.
The data plate has also been changed. The '73 L82 was 250hp/285ft/lbs, 9.0cr.
The trans stamp shows it to be a March 6th build, which is perfect for the body build date, which should be March 14th '73. Check your TRIM TAG for the build date to verify.
Joel Adams
C3VR Lifetime Member #56 
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Adams' Apple said:
The data plate has also been changed. The '73 L82 was 250hp/285ft/lbs, 9.0cr.
.
The data plate has also been changed. The '73 L82 was 250hp/285ft/lbs, 9.0cr.
.
I didn't know the L82 option produced that much HP!
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Overland Park, KS - USA
Joined: 7/9/2003
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Vette(s): 1973 Orange Metallic Coupe (orig owner), L82, 4 spd (WR), PS, (A/C & PW (I installed from wrecked 73)), leather, AM/FM Stereo, ran with '65 FI unit earlier & will again some day.
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73 MRVETTE said:
I didn't know the L82 option produced that much HP!
Adams' Apple said:
The data plate has also been changed. The '73 L82 was 250hp/285ft/lbs, 9.0cr.
.
The data plate has also been changed. The '73 L82 was 250hp/285ft/lbs, 9.0cr.
.
I didn't know the L82 option produced that much HP!
The 1973 and 1974 versions did.
1973 L-82 4 spd
in Forum: C3 General Discussion
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