That cam will make very unhappy with the FOM.  Different trans and converter or different cam.

   God Bless.   Tim                           http://yblockguy.com/

350ci Y-Block FED "Elwood", 301ci Y-Block Unibody LSR "Jake", 312ci Y-Block '58 F-100, 338ci Y-Block powered Model A Tudor

tim@yblockguy.com  Visalia, California    Just west of the Sequoias

Is there a high stall converter available for the FMX???

58 Ford Custom 300 - San Pedro, CA (So-Cal)

yes, several companies make them. Does your engine have the flexplate/flywheel that is not part of the converter?  That is the first and hardest thing you need to find for the FMX swap. they were on the 59 and later y-blocks with an automatic. If that is not clear post a picture of the back of the engine on the stand.

Gary Ryan San Antonio.TX.

There are high stall convertors for FMX.



The problem is the pilot on a Y block are one of its own so convertor selection is few, you have to use a Cruise-o-matic convertor and a cruise-o-matic front pump which has a lug drive not two flat spots as a FMX convertor. On a 58 you should have a cruise-o-matic transmission which is the welded convertor that bolts to a flexplate with the ring gear on the flex plate. Cruise-o-matics torque convertors have a stall speed of ~1800 RPM so is much to low for the camshaft you are using.



You can have these convertors modified but it costs money as they are special order. Another option is use a Bendtsen’s adapter and a C4 that has been modified to take the HP. I think JM sells a bell housing to adapt a C4 to a Y block also. Stock C4's are too weak, they are just a light duty transmission.



marv

Here's a picture of the back of the engine. I believe I unbolted the converter from the flywheel. Sorry I am unsure of the terminology. But what's a flexplate??? may sound like a dumb question. Sorry if its unclear in the photos.

According to the badge on the car, the tranmission is a Fordo.

Here's the trans still in the car. You can see the converter.

If you look at the last photos I posted you can see the trans in the background of the second photo hanging from an engine hoist. It's painted black.

58 Ford Custom 300 - San Pedro, CA (So-Cal)

Some times I cant remember my address. Flexplate is the flywheel for an automatic. The one you have on you engine. Flywheel usually means for a standard transmission/clutch/pressure plate. Marv is right about the size of the crankshaft pilot hole. If you order a converter for a FMX they can put a larger ring on the converter to make the converter work, or make a reducer ring to fit in crankshaft and on the converter pilot (the crown in the middle of the converter) on the FMX converter. The converter has to fit in that hole to stabilize it when engine is running. Hope I am making myself understood.

Gary Ryan San Antonio.TX.

The transmission you have is a Cruise-o-matic. It is known as the dual range transmission with a D1 and a D2 on the gear selector indicator. The transmission will have a cast iron centre section bolted with four bolts to the bell housing. Cruise-o-matics had four studs on the torque convertors. The aluminum case Fordomatics had three studs on the torque convertors. The aluminum case Fordomatics were used in the 59's, just for info.

marv

On the gear selector there's a 1, 2, D. No D1 or D2. Could this still be a cruiso?

58 Ford Custom 300 - San Pedro, CA (So-Cal)

You have everything you need to do the FMX conversion, except the FMX, should be easy to find. That flywheel or flexplate is solid gold, they go for big bucks. Find a good FMX, order the torque converter that you need for you combination, then have a bushing machined that will bring the FMX converter snout up to the FOM size. By the way you will have to use the bellhousing from your current trans and possible the tailshaft housing depending on which FMX you get. Do a search, this subject has been covered in depth before. If you don't have experience with auto trans, this maybe one project that you call in some help on or farm it out to a trans shop. It is not complicated, but it hard to commuicate what you have to do in the limited space of this forum, or it is for me. I can show you, but it's hard to tell you in away that is easy to understand.

Glen Henderson



Freedom is not Free

Letohatchee, AL

Thanks for the replys. I think I got everything figured out except for one thing.

- So I know I will use my current bell and tail housings that way I don't have to change the driveshaft.

- I will have to drill (2) holes into the FMX to attach the bellhousing

- Have to use the gasket from the FMX for the tailhousing

- I will need to hook-up a vacumn line

The only thing I don't understand is the snout deal for the converter. If I'm using a FMX trans and FMX converter why does the converter need to be modified? Is it because of the flexplate from the FOM? Sorry I just want to understand this completely before I take a crack at it.

58 Ford Custom 300 - San Pedro, CA (So-Cal)