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Topic: Swapping 350 for 383

in Forum: C3 Engines


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Swapping 350 for 383 (1/7)
 3/15/10 10:02pm
jp75vette
Former Member

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Bloomfield Hills, MI - USA

Vette(s):
1975 Corvette coupe, 4 speed manual, 383 ci 9.5:1,Edelbrock dual plane Air Gap intake, Alum Heads,Comp Cam, roller Rockers, PS,PB,Tilt


Joined: 6/29/2008
Posts: 199

I put a down payment on a 383 that is currently in a 1976 Chevelle. The Chevelle has automatic transmission. My 1975 has a BW S T-10Couple of questions; the engine has a long water pump, my engine has a short one, will long on fit?
 
I need to get a flywheel as this is an externally balanced engine. Will my starter from old engine work?
 
What other things do I need to plan for. The engine comes in two weeks.
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Swapping 350 for 383 (2/7)
 3/15/10 10:36pm
Adams' AppleLifetime 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: 20128

The water pump will not work in your car...you'll need to swap them, or get a new, short pump. The pulleys will not line up...short answer.

The flywheel will need to be balanced for the engine, and you'll also need to install a pilot bushing, or bearing, into the crankshaft for the trans. Depending on what size flywheel you get, the starter should be fine. Just make sure the flywheel you get is the same diameter, and has the same tooth-count as yours.
Everything else should bolt right up with no problems, unless the heads do NOT have threaded holes for mounting the A/C compressor, alt adjusting bracket, etc.


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Swapping 350 for 383 (3/7)
 3/15/10 11:46pm
lukesvetteLifetime Member
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HOWELL, NJ - USA

Vette(s):
1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.


Joined: 5/18/2004
Posts: 6812

One other thing to plan for way ahead of time:

A giant crowbar to pry that huge $^&* eatin grin off your face when you put your foot into that 383!!! Wink
Swapping 350 for 383 (4/7)
 3/16/10 1:23am
rearn2go72
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Bladenboro, NC - USA

Vette(s):
1972 conv., sunfire yellow, blk interior, blk vinyl and convertible top. Off frame restoration with American Speed 383 stroker engine producing 500hp plus a 200hp NOS system. MSD ignition. Hooker super competition headers with chambered exhaust.


Joined: 1/22/2006
Posts: 1058

[QUOTE=LukesVette]One other thing to plan for way ahead of time:

A giant crowbar to pry that huge $^&* eatin grin off your face when you put your foot into that 383!!! Wink
[/QUOTE]

But don't get caught too far away from a gas station.Big smile
Swapping 350 for 383 (5/7)
 3/27/10 6:25pm
CWALKER
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Carlisle, PA - USA

Vette(s):
1980 Coupe 2016 Stingray coupe


Joined: 11/10/2009
Posts: 54

 I guess you got the motor by now, did you consider if the 383 was was a right or left dipstick? Is that an issue.


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Swapping 350 for 383 (6/7)
 3/27/10 6:58pm
jp75vette
Former Member

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Bloomfield Hills, MI - USA

Vette(s):
1975 Corvette coupe, 4 speed manual, 383 ci 9.5:1,Edelbrock dual plane Air Gap intake, Alum Heads,Comp Cam, roller Rockers, PS,PB,Tilt


Joined: 6/29/2008
Posts: 199

 
The old motor is out now. I'm starting to organize and get the C3 parts on the new motor.
 
The dip stick is a right hand one. I plan to use the ignition wire sheilds, but have found out that I will need to modify the sheilds abit to package the dipstick.
Swapping 350 for 383 (7/7)
 3/27/10 9:57pm
ranger3Lifetime Member
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North Charleston, SC - USA

Vette(s):
1975 L48 AT AC T-top


Joined: 3/20/2004
Posts: 4176

Thanks for the update...keep us posted.
 
Scott
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