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Topic Review (Newest First)
08-16-2012 03:49 AM
skingraft did 62cadillac ever fit the 350 chev into the caddy. we are also doing the same conversion with 350 crate motor and new turbo 400 trans and twin 4 barrel tunnel coming as well. costs in new zealand to rebuild our tired old 390 caddy deemed it over the top. the 350 chevy will blitz the caddy be reliable and parts easy to get. our caddy can be seen on youtube under pink cadillac lowrider its a 1962 coupe deville
05-11-2007 04:19 PM
willowbilly3
Quote:
Originally Posted by 62cadillac
well my main concern was to find something that anybody can work on for cheap. I've already purchased a 350 Chevy Engine and 350 Turbo Trans to do the swap. I'm not trying to build a Race Car or anything, just a Daily Driver that I can depend on.
If you want something to work on for cheap a 62 Cad might not be it, even with a chevy motor. In my opinion you are just ruining a good old car putting a cheap engine in it. Good running cad engines can be had for cheap. I have had 425/th400s given to me just to haul them off. A caddy deservs a caddy engine.
05-11-2007 03:23 PM
oldbogie I think we pretty much bashed this idea into few options for you.

The limiting factor is the old Dual Range Hydro-Matic transmission. It only bolts to pre-1964 engines. The new 64 up BOP-C bolt pattern on the block doesn't accept the older bell-housing. The Chevy bolt pattern is different again and while it possible to purchase Chevy/BOP-C adapters; the only source of 64 and up BOP-C or Chevy to Hydro-Matic transmission adapters has long ago dried up.

This limits you to using a pre-64 Caddy engine, there's worse things in life, if you want to retain the DR Hydro-Matic. Or:

1, You get lucky and find an old B&M adapter Chev to DR Hydro-Matic at a swap meet, Hemmings, e-bay, something like those places. Or you stumble into a 64-up adapter for BOP-C which would let you use the more modern Caddy V-8s.

2, You change to a TH-350/400, 700R4/4L60, 4L60E/4L80E gearbox which will let you run any modern GM V8. Once again this is simpler as Chevy to Chevy; but Chevy can be commercially adapted to 64-up BOP-C and some of these came with both bolt patterns.

Lastly you need to realize that the Cad's value to collectors goes way down with any non numbers matching engine and a non-original type transmission. So I guess before breaking the numbers matching stream you have with the 390, it would have to be a basket case before I go down that road.

If you don't care about numbers matching and want to be in a world where parts are available at reasonable prices, my modern response would be a BBC with a TH-400 or if wanting more recent technology, still a BBC with a 4L80E. The latter gear box will give an overdrive 4th combined with a lock up converter for really efficient, slow RPM cruising. Plus it has a really deep low, like your DR Hydro-Matic, to launch this heavy car. If you went for a fuel injected BBC this would be a super set up.

You could do a 350 or even a 383, but from where my experience has been, when you talk a car that's as heavy as a modern 3/4 ton pick up, you'll be happier, longer with the engine and transmission from the 5000 pound truck. It's not that you can't get power out of a SBC, but asking it to that and move 5000 pounds of vehicle really reduces its life span. Besides a 350 just wouldn't have the torque to launch the Caddy, espacailly with a TH-350 transmission. which has almost a ratio higher low gear and no OD. Getting the Caddy launched takes a lot of torque, this really takes some cubic inches from the engine where a long stroke is better at torque on the bottom end where it's needed with this rig; and it takes some steep gears to help get it launched. I think an SBC with a TH-350/700R4/4L60/4L60E is in over their structural head. I' mean they'll do, but it just won't last.

Bogie
05-11-2007 02:33 PM
62cadillac So does anyone know of anything I need to look for with doing the install or have any tips/pointers that might help me get it done?
05-10-2007 01:17 PM
joe_padavano
Quote:
Originally Posted by oldbogie
Thanks for making me realize how ancient I've become.

Great, just great! Now it has tear stains to go with its aged pages.

Bogie
Yeah, getting old is a ******, but it sure beats the alternative...
05-10-2007 10:47 AM
oldbogie
Quote:
Originally Posted by joe_padavano
Don't bet on it. The 62 trans uses a different bolt pattern than the later model BOP transmissions. Adapters are NOT readily available.
Thanks for making me realize how ancient I've become. When first reading the thread, I couldn't understand all this talk about not being able to mate a Chev engine to a Hydro-Matic. I knew that B&M made an adapter, I could see it in my minds eye. So I went to the B&M site but couldn't find a reference. When I got home, I pulled the old B&M catalog off my bookshelf and looked it up and sure enough, just as I remembered, there it was! So I plugged into the web at home and fed it the B&M part number, nothin'. So I went back to the catalog thinking I messed up the part number. At that point I realized the musty, tattered, brown paged catalog was 45 years old.

Great, just great! Now it has tear stains to go with its aged pages.

Bogie
05-09-2007 03:55 PM
F-BIRD'88
Quote:
Originally Posted by 62cadillac
well my main concern was to find something that anybody can work on for cheap. I've already purchased a 350 Chevy Engine and 350 Turbo Trans to do the swap. I'm not trying to build a Race Car or anything, just a Daily Driver that I can depend on.
You're spending hundred dollar bills to save dimes and quarters.
05-09-2007 02:40 PM
62cadillac well my main concern was to find something that anybody can work on for cheap. I've already purchased a 350 Chevy Engine and 350 Turbo Trans to do the swap. I'm not trying to build a Race Car or anything, just a Daily Driver that I can depend on.
05-09-2007 07:44 AM
joe_padavano
Quote:
Originally Posted by matt167
adaptors can be made for anything. there are company's that will make them custom. my friend had 1 done by a guy ( 1 man company ) in Washington
Agreed, but responses to this thread had implied that a 500 would bolt up to the 62 trans or that you could use a BOP-to-Chebby adapter available from Summit to install the SBC. Most seem to be unaware that the 62 Caddy trans and engine used a unique bellhousing bolt pattern.
05-08-2007 11:16 PM
Trans Am Tony I would buy a 500 Caddy and put the 472 heads on it. Hot Rod magazine did that in an issue a while back, and got over 500 lb/ft of torque running 91 octane. They put that monster into a 1978 Chevy Chevette (required full rollcage, removing the firewall and other major mods). It was a BEAST!!!!!!!!!!!!
05-08-2007 07:58 PM
F-BIRD'88 Why do you want to change the motor to a chevy.
These old caddy motors were state of the art domestic engine design of the day. Remember SBC's were designed at the same time and designed to be cheaper to build.
You'd be taking a step down for a lot of bother. What's wrong with the caddy motor that can't be fixed. Sell off all the chevy parts ya got laying around to help finance rebuilding or repairing the caddy motor as required.
I'll bet what ever is wrong with your caddy motor can be fixed for less $$$ overall than swapping in a SBC. You can even do some modernizing like electronic ignition to eliminate the old Delco points.
05-08-2007 05:04 PM
Deuce I like 350 Chevrolets as good as anyone and better than most but WHY ???
The Cadillac is heavy ... and needs a lot of torque to get moving. If you must change engines ... find a later, bigger Cadillac engine ...

Trust me ...
05-08-2007 04:38 PM
matt167
Quote:
Originally Posted by joe_padavano
Don't bet on it. The 62 trans uses a different bolt pattern than the later model BOP transmissions. Adapters are NOT readily available.
adaptors can be made for anything. there are company's that will make them custom. my friend had 1 done by a guy ( 1 man company ) in Washington
05-08-2007 01:06 PM
joe_padavano
Quote:
Originally Posted by oldbogie
But the only real problem which is simple to fix is the engine to bellhousing bolt pattern. Adapters can be had.
Don't bet on it. The 62 trans uses a different bolt pattern than the later model BOP transmissions. Adapters are NOT readily available.
05-08-2007 12:34 PM
oldbogie
Quote:
Originally Posted by 62cadillac
I have a 1962 Cadillac with a X-Frame Body and would like to see if anyone has any pointers on converting to a Chevy 350 Small Block Engine?
You will feel the loss of torque big time. But the only real problem which is simple to fix is the engine to bellhousing bolt pattern. Adapters can be had.

But if I didn't want a caddy motor, I think you'd be happier with a big block Chev in there.

Bogie
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