High Performance Big Block Cadillacs
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Author Topic: need advise: 500 cad in a '56 chevy  (Read 7051 times)
classic gary
C1
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Posts: 4


« on: July 19, 2008, 08:57:00 AM »

So I was going to put a cad in a '66 chevelle. Changed my mind. Sold the chevelle and bought a '56 150 2 door post.
Now I'm thinking 500 and TKO500 and 9". Can't be too tough, if a 500 will fit in a chevelle it'll fit in a classic chevy. BOP bellhousing, "custom" flywheel, shouldn't be to tuff after that. is my thinking on track? Any experiences................
Thanks, Gary
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Monzallac425
C4
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Posts: 491


Salinas, Puerto Rico


« Reply #1 on: August 13, 2008, 04:10:43 PM »

Sorry Gary that no one posted to your reply, I guess you are on your own doing this swap................I guess that makes it more unique since you will have one of the only ones like it.  Good luck on your project !  Smiley  Doug in AZ Cool
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Monzallac 425 ....now on its 4th owner....Its still alive.............Somewhere.........?
~JM~
Shop Keeper
C5
*****
Posts: 1853


« Reply #2 on: August 14, 2008, 11:10:21 PM »

Hey Gary,

I don't know how your post got past me. Guess I'm just gettin' old.

This might be helpful: http://caddy500.com/index.php?topic=764.0

Many have talked about dropping a Cadillac 500 into a Tri-5 Chevy over the years, but I'm not aware of any that were completed. I wouldn't think that it would be a difficult swap to perform.

Maybe the owner of the Gasser for sale would be able to provide some useful info.

Good luck & please let us know what you find out.
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PS. You don't have enough cam. Grin

...Summit has a kit for $99.... Shocked
oldchevyguy
C1
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Posts: 19


« Reply #3 on: March 15, 2009, 07:17:44 AM »

Hi:
I read of your plans to put a 500 in a tri-five with interest because I am presently putting one in a 55 Chevy truck. One thing I can advise you about for your sway is that you will probably have to modify your firewall. The caddy engine is much longer than a small block Chevy. If you look at the pictures of the red Chevy presented earlier in the thread you will see the firewall is severely modified. You can buy complete firewalls ready to weld in with this "dog house" already installed. They are available for 55 - 59 trucks also but I am modifying mine myself. I am making mine removable from the inside to ease in service. Steering shaft clearance may be an issue also as I think the steering box on these cars and trucks was on the inside of the frame. My project is on a 80 C10 frame which presents its own steering problems as the box is on the outside of the frame. On yours it might be necessary to convert to a rack and pinion setup. Just my two cents.       
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cadillac531
C1
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Posts: 11


« Reply #4 on: May 12, 2010, 09:54:26 PM »

So I was going to put a cad in a '66 chevelle. Changed my mind. Sold the chevelle and bought a '56 150 2 door post.
Now I'm thinking 500 and TKO500 and 9". Can't be too tough, if a 500 will fit in a chevelle it'll fit in a classic chevy. BOP bellhousing, "custom" flywheel, shouldn't be to tuff after that. is my thinking on track? Any experiences................
Thanks, Gary

Hi Gary.  I'm new to this forum and just saw your post.  I do have experience in putting a 500 in a '56.  You can certainly stick that motor into a '56.  You'll have to make provisions for the radiator, as the motor is a little longer than a Big Block Chevy.  Here's a video of my '6 
http://www.youtube.com/watch?v=05TCbeIY9MA

Thanks
Constantine
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sMiles
C4
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Posts: 321


« Reply #5 on: May 13, 2010, 08:13:11 AM »


Hi Constantine,  I'm happy to see you made it over here,  good talking with you .

Great looking and sounding Bel Air .

Miles
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cadillac531
C1
*
Posts: 11


« Reply #6 on: May 13, 2010, 01:06:40 PM »


Hi Constantine,  I'm happy to see you made it over here,  good talking with you .

Great looking and sounding Bel Air .

Miles

Hi Miles.  It was great speaking to you yesterday, too.  Thanks for giving me the link to this forum.  There's seems to be a lot of great information and people on here.

Constantine
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~JM~
Shop Keeper
C5
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Posts: 1853


« Reply #7 on: May 13, 2010, 03:54:58 PM »

Cadillac531,

Welcome to the board. I just watched your video for the second time. What an awesome & beautiful car!  Shocked Cool  Please tell us more about it, if you have the time. That car deserves a post of its own & then some!

Thank you
~JM~
Logged

PS. You don't have enough cam. Grin

...Summit has a kit for $99.... Shocked
dave brode
C5
*****
Posts: 1074


Best of 11.66, 113.96, 1.59 sixty


« Reply #8 on: May 13, 2010, 04:27:34 PM »

Constantine,

Welcome. I'll be frank. Did you see 1100 horse on the dyno? If so, what type. I would love to see the graph.

EDIT: what fuel was used?

Dave



[/quote]

Hi Gary.  I'm new to this forum and just saw your post.  I do have experience in putting a 500 in a '56.  You can certainly stick that motor into a '56.  You'll have to make provisions for the radiator, as the motor is a little longer than a Big Block Chevy.  Here's a video of my '6  
http://www.youtube.com/watch?v=05TCbeIY9MA

Thanks
Constantine
[/quote]
« Last Edit: May 13, 2010, 06:16:47 PM by dave brode » Logged

3960 lb '71 C-10. 11.7-1 CR 514". PEP I beam rods floating MTS 18cc dish Probes, Elgin solid cam, home ported heads, MTS 2.19/1.84", Potter/Probe shaft rockers, edel 2115, 4781 850. Switch-pitch TH400, 12" 1800/3200 Tri-Shield convertor, 4.30 gears. Best so far of 11.66, 114.8 mph and 1.59 sixty
cadillac531
C1
*
Posts: 11


« Reply #9 on: May 14, 2010, 08:49:02 AM »

Hello Dave (Frank):

I put her on a water brake dyno 15 years ago.  Ran 100 octane fuel.  I don't have the graph to show you, so you can take my word for it if you'd like.  Grin
« Last Edit: May 14, 2010, 02:50:32 PM by cadillac531 » Logged
cadillac531
C1
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Posts: 11


« Reply #10 on: May 14, 2010, 09:08:36 AM »

Cadillac531,

Welcome to the board. I just watched your video for the second time. What an awesome & beautiful car!  Shocked Cool  Please tell us more about it, if you have the time. That car deserves a post of its own & then some!

Thank you
~JM~

Hi JM.  Thanks for the kind words.  The car has been in the family for a very long time.  My grandmother purchased the car for my father out of the junkyard for $125 when he was 14.   It's kind of like a family heirloom now  Smiley  We did a complete frame off on it, back-halved it, tubbed the body, stuck a 4 link rear in the back with a Strange 9" Nodular set up and 31 spline axles with 4.56 gears.  The motor is out of a '76 Deville.  We punched the motor .030 over and turned the crank to BB Chevy Specs.  It's a 4.333 bore by 4.500 stroke.  It's got Aries forged pistons, Elgin Pro Stock BB Chevy Rods.  We ported and polished the heads, enlarged the valve seats, stuck a mean Comp Cam in it, Manley Valves, Dove Roller Rockers, 8-71 BDS blower with dual 715 Holleys.  Trans is the 400, but built to handle the torque (over 1000 ft/lb)....sorry no graph Smiley with a stall and a custom 4" drive shaft back to the rear.  We stuck an 8 point roll bar in it, seats from an '86 Corvette Convertible and had it all wrapped at an interior shop in Ohio (Portage Trim).

It was going to start off as a mild street machine....but then the ideas kept coming...you know how that goes Smiley

Check out our website if you'd like.   www.pappasmotorsports.com.  On the left is a menu and you can "Check out our rides."  I have some other pictures on there, too.

Thanks.
Constantine 

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dave brode
C5
*****
Posts: 1074


Best of 11.66, 113.96, 1.59 sixty


« Reply #11 on: May 14, 2010, 06:44:56 PM »

Hello Dave (Frank):

I put her on a water brake dyno 15 years ago.  Ran 100 octane fuel.  I don't have the graph to show you, so you can take my word for it if you'd like.  Grin

D,

I only wondered if you dyno'd and saw the number, or if you were simply told that it would [or should] make that number. I have no reason to not take your word on what you saw.

Dave
Logged

3960 lb '71 C-10. 11.7-1 CR 514". PEP I beam rods floating MTS 18cc dish Probes, Elgin solid cam, home ported heads, MTS 2.19/1.84", Potter/Probe shaft rockers, edel 2115, 4781 850. Switch-pitch TH400, 12" 1800/3200 Tri-Shield convertor, 4.30 gears. Best so far of 11.66, 114.8 mph and 1.59 sixty
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