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Old 02-18-2008, 04:18 PM
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62 Caddy engine/tranny swap

Gotta figure this one out for a friend. He just bought a 62 Caddy with a very sick 390 and torqueflite (the one with reverse all the way at the bottom of the shifter)

I have three running chevy 350s and access to several TH400 and TH350 trannys of varying tailshaft lengths, all of which are cheap, and I figured someone has to have done this before which may make it a little easier.

Will I get lucky and be able to find a tranny that is the same overall length and same output shaft so I don't have to change driveshafts? Will I get lucky and find engine swap mounts for a SBC? Anyone put an SBC into an old caddy? Any info you might have would be greatly appreciated. The bottom line is that future plans may include a full resto, but for now it has to get on the road under its own power, pronto. It kinda has to be a slam dunk because we don't have the time or place to tear it apart, measure, fabricate, and design. If I can line up all the tech and specs that I can first it would be a great help.

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Old 02-27-2008, 11:38 PM
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Cad/ 350 swap...

I get all my cad swap stuff from Maximum torque specialties in california. They used to be in wisconsin. (another story) I believe they are at: 500cid.com

Those guys can tell you what you need to know. Otherwise send an e-mail to Allcads.com Ed can hook you up too. Warmest regards S/C.
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Old 02-28-2008, 03:32 AM
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I've never done such a thing, so I went searching. Best I found was a thread on H.A.M.B. from 2004:

Quote:
I have a '62 Cadillac Park Avenue & the trans took a dump. So I put in a stroked 350 sbc & a Th350. I had to use an electric fuel pump cuz the front crossmember hit the stock one. I used 1/2" x 3" x 3" steel plates from the mounts & welded them to the crossmember. Fabbed up a tranny mount & it was done in a day. The K&N air filter was too tall so I use an Edelbrock.
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Old 09-02-2010, 09:30 AM
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62 Engine/Tranny swap

The big deal with getting rid of the old Jet-A-Way transmission that came in the early Cadillacs is that the starter was bolted to the transmission. There is no reasonable way to bolt a starter to the 390 engine without the Jet-A-Way transmission because the flex plate is part of the taurus bowl (torque converter). I opted to go with a fresh built 472 and a TH-700R-4 out of an '88 Suburban, also fresh. I had the machine work done on the 472, new heads, magniflux the crank, rods, and block, hone the block, balance the spinning gear, new cam, lifters, timing gears, pistons, rings, etc. and did the assembly myself. I had the TH-700R-4 rebuilt by a local transmission shop. The engine work and parts cost me $1,600.00. The transmission cost $2,000.00, I had them build it tough. I am in the installation process and here are the things I have encountered. The 390 mounts too close to the firewall to accommodate the stock motor mount location. I cut new holes in the cross member 3 1/2" forward of stock to get my 472 to fit. I had to cut and modify the motor mounts to the correct angle to fit on the crossmember. I had to use a 500 Cadillac pan to fit behind the crossmember. I had to notch 2" out of the front of the pan to clear the tie rod. I had to use the mid-sump oil pickup welded to the 500 pickup tube to get the pickup to face rear to clear the notch in the front of the pan. I had to notch the frame at the radiator core support to allow use of a new aluminum radiator for a '73 El Camino. I used the dimensions of the available opening to pick one out of a catalogue. I had to make my own radiator mounting brackets, top and bottom. I still need to buy a torque converter lock up controller to operate the TH-700-R and it's lock up torque converter. The transmission may or may not fit once the engine is in, it appears to be 1/2" too tall to slide under the firewall/transmission hump body seam. I will cut and weld the seam if it becomes a problem. I will have to fabricate a transmission crossmember that will use the stock Suburban TH-700-R transmission mount (easy). The preliminary measurements I took showed the 472 /TH-700R-4 to be 1/4" shorter than the stock 390/Jet-A-Way, but now that I have moved the engine 3 1/2" forward, I may need to have the front half of the drive shaft lengthened accordingly. Once complete, I will have 373 HP at over 500 ft.lb torque with a dependable transmission and easy to acquire parts that I can drive anywhere, as smooth as a cat walking on cotton...... Yep! It is a big project, and I couldn't do it without my MIG welder and plasma cutter but I am doing it in my garage, in my spare time, and when I am finished I will have something I can depend upon and be proud of.
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