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5/21/15 11:59am - Original Message: '1973 identification help'
RobbK2
Former Member
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Kent, WA - USA

Vette(s):
1973 300hp 4sp

Joined: 5/20/2015
Posts: 1
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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5/21/15 5:14pm - Reply: 'Re: 1973 identification help'
dwa175 Gold Member
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oakville, CT - USA

Vette(s):
1979 coupe and now 2007 c-6

Joined: 7/19/2014
Posts: 183
you can do a vin check on this site and see what you have   engine number is on r/s frt engine head  should match vin    do this frist then report back for help   dwa175

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5/21/15 5:45pm - Reply: 'Re: 1973 identification help'
Sarge81 Lifetime Member
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WEST SENECA, NY - USA

Vette(s):
1981 Blue Ice Met. w/pearl ghost flames TKO500 5speed. LS1 Swap 3.45 Dana 44.

Joined: 12/3/2001
Posts: 2376
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.


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5/21/15 9:10pm - Reply: 'Re: 1973 identification help'
Vman73
Standard Member
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Gig Harbor, WA - USA

Vette(s):
1973 L82 4 Speed Coupe - Very original, well documented driver/survivor. 2016 Bend Regional NCRS Top Flight.

Joined: 10/2/2014
Posts: 362
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.


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John Sigmund
valkman57@sbcglobal.net
NCRS Member 61302
NW NCRS Chapter Member



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5/21/15 9:49pm - Reply: 'Re: 1973 identification help'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

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

Joined: 11/8/2003
Posts: 19457
Well CRAP! I just put all this info in a post, and it disappeared!!  Censored Angry
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. Thumbs Up

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Joel Adams
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5/31/15 12:39pm - Reply: 'Re: 1973 identification help'
73 MRVETTE
Former Member
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Joined: 6/19/2013
Posts: 10
Adams' Apple said:
The data plate has also been changed. The '73 L82 was 250hp/285ft/lbs, 9.0cr.

. Thumbs Up

I didn't know the L82 option produced that much HP!




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6/5/15 9:25pm - Reply: 'Re: 1973 identification help'
73shark
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Overland Park, KS - USA

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.

Joined: 7/9/2003
Posts: 396
73 MRVETTE said:
Adams' Apple said:
The data plate has also been changed. The '73 L82 was 250hp/285ft/lbs, 9.0cr.

. Thumbs Up

I didn't know the L82 option produced that much HP!




The 1973 and 1974 versions did.  Cool


____________________________________

1973 L-82 4 spd

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