GM 400 to a Ford 205

[MEK5]

Damn I forgot I had this GM to Ford 205 adapter,I traded some stuff with a guy about 5 years ago and this spacer was hooked to a Ford 205 with a short 32 spline input via a NP-208 adapter.After some measuring I determined that they used a long output(4 1/2" stickout) TH400.This spacer is made from steel and its 1 1/4" thick and well made by a real machinist because all the fits are right on,only 5 of the adapter bolts are used because the notch for the shift rail deleted 1 of them.

I`m not looking to sell anything here,just throwing out some ideas for you to consider since your trying to save a buck and use whatya got.

You could put the long 32spline input gear in the Ford case and use the GM 205 adapter with the 2WD version TH400 that you have and make a spacer similar to mine.
I have a 2WD 400 here and it has a shaft stickout of 4 1/2" with 2 3/4" of it splined but you only need 2" of spline because thats how much the inputs have so you could cut about 3/4" off the 400 shaft and make a spacer 1 1/4" like mine or 2" if you dont want to cut.

You could clock it up some and make the rail notch alot smaller and be able to add that sixth adapter bolt back in there too!

This spacer/adapter would be simple to make and billet would work nicely because its thick enough to support plenty of threads,NWF could hook you right up I bet!

 

[b454rat]

that's what I need. Anyway I could "borrow" that so I can get one made??? Buddy works at a pretty good machine shop just down the road....

 

[MEK5]

that's what I need. Anyway I could "borrow" that so I can get one made??? Buddy works at a pretty good machine shop just down the road....

Sure, I could send it down your not that far away.
Im going to look at this some more with the 400/205 short adapter later on and see if theres any bugs that need to be worked out.

 

[b454rat]

Pm sent!!

 

[MEK5]

Sure, I could send it down your not that far away.
Im going to look at this some more with the 400/205 short adapter later on and see if theres any bugs that need to be worked out.

OK Had a chance to mock this up and the spacer will need to be 1 1/2" thick min. and the 400 output will need a 1/2" cut off.
If you want or can have it clocked up about 1 3/8" then you will be able to use all six adapter mounting bolts otherwise only five will be used.

I looked at ovalizing as u2slow suggested and it could be done and I think would not cause any problems but will need to be clocked about 2" up or flat which puts your front output yoke Very high but having the HP 60 will help with the driveshaft angle if your not using a tall lift.

I used a cut down adapter for mock up so you can see where all the holes land and transfering punch marks. If your set up can handle a 2" up then a 400/205 adapter with a short input gear is the easy way out.

The pictures with the red marks are the mods that you will need to do for the flat rotation and the others are the spacer/long input method.

 

[b454rat]

Looks confusing without seeing it in person, but I think I can figure it out. Looking at the pic showing the holes that could be ovaled out, I don't see why it would pose a problem, there is still plenty of meat there for a strong hold. Since this isn't the OBS, but a once IFS truck, dont' know what a big lift would be, but once it's lifted, it will have about 10" of lift, over a stock IFS truck. Gonna havta put the axle in first, and maybe mock up the t-case to see how much of an angle it will be. The stock 1310 CV is gonna havta work for now till I can afford or find a 1350 CV. I sold the 60 front, the ORU kit, hopefully some tires, a 400 short block, and maybe a set of Vortec heads, so no reason why I shouldn't be able to get this thing up and running, I want to go to Paragon!!! I might even go with the stock 241 with a SYE in it. Then when I get some more money I will go with the doubler. But in order to run a 241, I have to swap tranny's AGAIN, which I really don't want to do again.....

 

[MEK5]

Yeah ,with the hole spacing not being equal it can be confusing without putting your hands on it.I went thru this awhile back with clocking rings/aluminium transfers and GM is the odd man out this time with Ford and Dodge having the same rotation pattern but different side front output drops

Heres a worthless picture but good for a chuckle,GM TH400/205 adapter on a Ford 205.I spun the adapter until all the holes lined up and it looks to be 90 degrees out but most likely as NWF said 77 or so!

 

[b454rat]

LOL, that last pic could work for Rockwells!!! Do I need to cut the output shaft, or could I get a thicker spacer??I have the 241 adaptor, and only a matter of time before I get the Ford case. Just trying to do this cheap, as I don't have a tone of money just yet, but I want it done right.