High Performance Big Block Cadillacs
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Author Topic: New guy here, stuffing a 472 in a '39 Chevy, hopefully...  (Read 5621 times)
Mc39
C1
*
Posts: 13


This is the project car.


« on: May 01, 2011, 04:00:33 PM »

New guy to the forum, but not to cars.
I have a couple of questions for all you folks out there:
First the scenario, then the questions.
I have a 1939 Chevy 2dr Sedan, and I want to put a 472 in it.
The car will have a 2.29 rear from an '82 Grand Prix.
I have located a rebuilt BOP turbo 350 that will work with the tranny crossmember I have already installed, so it seems like a good idea.
Thing is, I  need to locate a reasonably priced dual pattern flexplate to make it work.
Or, I take out the crossmember and install a different unit for the TH400.
I am past my tire shredding days, so I think the TH350 should do the job.
Questions:
1: Is there a reasonably priced dual pattern flexplate?
2: Does anyone know of a vendor for streetrod style motor mounts?
    I have some designed and cadded up, but ready mades would save the fab time and hassle.
    These http://www.chassisengineeringinc.com/page1.html look very close, but they are not shown on the website (as far as I can find so far). I will call them on Monday.

Update: I looked at the site and those are early hemi mounts shown. Guess I get to use my local laser cutting guy and fab some mounts.
« Last Edit: May 01, 2011, 04:21:52 PM by Mc39 » Logged
MTS Marty
C4
****
Posts: 282


« Reply #1 on: May 02, 2011, 07:48:42 AM »

We have 3 multi-pattern stock style flexplates left. They are not on the website  $89.95   One of these has slight surface rust  $69.95
MTS 760 247-2533   ask for Marty   We also have the SFI plates but don't seem to be what you want  DT01  $149.95
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Mc39
C1
*
Posts: 13


This is the project car.


« Reply #2 on: May 02, 2011, 02:21:44 PM »

Marty,
A short session in the blast cabinet should take care of it.
I am still waiting on the guy with the TH350 to get back with me.
Thanks,
Mike
Logged
~JM~
Shop Keeper
C5
*****
Posts: 1853


« Reply #3 on: May 04, 2011, 11:13:34 AM »

Welcome to the forum. There is a seller on eBay that offers a motor mount kit.
http://cgi.ebay.com/ebaymotors/Cadillac-Big-Block-500-472-425-368-Motor-Mounts-_W0QQcmdZViewItemQQhashZitem3caeb9e8fcQQitemZ260629457148QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

I haven't heard anything good or bad about them. They look real nice. Cool

Please let us know if you hear anything or run across any others.

Thanks
~JM~
Logged

PS. You don't have enough cam. Grin

...Summit has a kit for $99.... Shocked
Mc39
C1
*
Posts: 13


This is the project car.


« Reply #4 on: May 06, 2011, 09:00:42 PM »

Those do look nice, but I have the hat section Chevy frame and it is best not to weld to it, or induce lateral loads that would tend to push the frame apart, unless there is a crossmember added at that location...
I am designing motor mounts that work with the "standard" streetrod frame mounts which mount the engine on a horizontal plane with "buscuits".
(Ref: The image in the link in the first post.)
C.E. makes mounts similar to what I am doing, but they are for the early Hemi.
Maybe I will sell my plans to them...who knows?
You guys will get free info to roll your own, or perhaps a set cheap if there is a need.
More as the busted knuckle bleeds......
« Last Edit: May 06, 2011, 09:11:03 PM by Mc39 » Logged
steelybill
C3
***
Posts: 190


« Reply #5 on: May 21, 2011, 08:07:47 PM »

Is your '39 a Deluxe, or a standard model?  The deluxe had the knee-action front suspension, while the standard had normal springs.  My Dad had a deluxe when I was a kid, in the 40s.  Seems like the standard type with leaf springs (?) would be easiest to use/modify with a heavy engine.......

 That TH350 will hang together longer with a Transgo shift re-programmer in it.  It will reduce the wear on the clutches too.  I've used 4 of those in the 350s so far with good results.
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Mc39
C1
*
Posts: 13


This is the project car.


« Reply #6 on: June 22, 2011, 09:11:49 PM »

Okay, there is good news and bad news...
Good news:
I finally got the '75 500 home safe and sound. YAY ! ! !
Bad news:
There is no way (short of a VERY expensive steering offset unit) that the 500 will work in my '39 Chevy.
The steering location comes out right smack dab in the middle of the head, and being that the left head is the one offset to the rear, I have a nifty cast iron wall that blocks any form of U-joint.
My steering is about 10 inches off center of the car, and I need at least 13 to make it work with a Caddy mill.
Too bad Chevy waited until '55 to use a V8.
So, anyone need a 500 and tranny that isn't siezed?
It "ran when pulled" is all I know.
I might just stick it in the corner for another project. We'll see.
Thanks,
Mike
Logged
~JM~
Shop Keeper
C5
*****
Posts: 1853


« Reply #7 on: June 23, 2011, 08:24:42 AM »

Would this help?
http://www.cenpen.com/box.htm

Good luck
~JM~
Logged

PS. You don't have enough cam. Grin

...Summit has a kit for $99.... Shocked
Mc39
C1
*
Posts: 13


This is the project car.


« Reply #8 on: June 23, 2011, 12:24:52 PM »

OH THANKS A LOT ! ! !   Grin
Now I get to go BACK to the decision making process.
Looks like a cool unit, and MUCH better priced than other offset units I have seen.
Like I said, back to the deciding.
Good info, thanks.
UPDATE:
Just went up to the shop and pulled tape on the various dimensional concerns again, and the Caddy is almost into the radiator, and the PS pump and Alt look like they will protrude thru the inner fenders.
Guess it is time to put the front end on again for ANOTHER fit check, eh?
Maybe I should just go get another Cadillac for the engine. Wouldn't THAT be a shame?
« Last Edit: June 23, 2011, 02:03:24 PM by Mc39 » Logged
Mc39
C1
*
Posts: 13


This is the project car.


« Reply #9 on: June 23, 2011, 02:05:41 PM »

And to reply to Steely Bill:
It is a Deluxe, but now has a MII in it.
« Last Edit: June 23, 2011, 02:38:37 PM by Mc39 » Logged
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