High Performance Big Block Cadillacs
November 21, 2017, 02:44:19 AM *
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Author Topic: 500 Cadillac in a '54 GMC 1-ton  (Read 28196 times)
dave brode
C5
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Posts: 1074


Best of 11.66, 113.96, 1.59 sixty


« Reply #45 on: December 07, 2009, 11:57:42 AM »

and thinking hard about replacing the oil pump.



If the stock alum pump looks good inside [no cuts from grit], I would give the body to block sealing area a pass or three on fine paper and oil just to smooth it a little and run it. Terry has made 1000s of passes with his T using alum stock pumps. I have yet to find one good enough to re-use.

The pump gears stick out of the body, and the gasket thickness sets the running clearance. Some guys measure the pump gear hiegth and fine tune it by sanding/machining the pump body. Be careful if you do, the alum cuts easily and quickly when sanding. I would not go tighter than .003" or .004" total end clearance, although some may claim that you can go tighter.

 Make sure that the gasket is .008" thick or less. Some supplied gaskets are too thick, which increases the pump gear to block clearance [reduced pressure/flow]. MTS sells the proper gasket, but I have found gaskets in the Felpro front cover gasket sets to be ok.

Dave
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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
SRB
C2
**
Posts: 23


Yep, its a oil road.


« Reply #46 on: December 07, 2009, 06:45:44 PM »

Sorry oldsub
   
     I got so excited when you spoke of hauling/towing 70 MPH, decent MPG, with enough power to pass in a 1-2 ton truck I lost it and injected my questions which were your questions just different vintage........Duh!    Good luck with your project.

     I'll post a new thread
 

Regards

Steve

     
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OldSub
C2
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Posts: 36



WWW
« Reply #47 on: December 07, 2009, 08:12:19 PM »

I'll post a new thread

I'll be following your progress!
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OldSub
C2
**
Posts: 36



WWW
« Reply #48 on: August 04, 2010, 11:04:35 PM »

Very brief update.

I've done little because I've been fighting cancer since last fall.

My recovery is at a point where I'm starting to do things again and I've just made a trade that changes this project.

I traded what's left of a rusty '72 C10 for the frame, IFS, steering and rear suspension from a '72 1-ton dually.

Impact on my project is that instead of fab'ing suspension mounts I'm fab'ing body mounts.  I feel the lower required level of precision makes this a better alternative for me.  Aside from changing the frame and using the C30 suspension instead of C20 it changes one other important thing.

Instead of fab'ing engine mounts for an unual combination, the Cadillac in the '54 GMC frame, I'm mounting my motor and trans in the same basic frame as many of the rest of you.  I'm thinking flipped brackets with the 425 mounts.

No photos yet because I'm really only thinking about the project, not able to do any actual work.
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~JM~
Shop Keeper
C5
*****
Posts: 1853


« Reply #49 on: August 05, 2010, 09:54:21 AM »

Oh man...  OldSub... I'm so sorry to hear of this detour that you have been faced with. Please send me a PM with your contact info. I believe that we may be located somewhat close to each other. If there is anything I can do to help, please do not hesitate to let me know.

Good luck
~JM~
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PS. You don't have enough cam. Grin

...Summit has a kit for $99.... Shocked
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