Pitman arm positiin

[jamesroney]

Power Steerin Pitman Arm
72------D3TZ 3590-A
73/75--D3TZ 3590-A
76/77--D6TZ 3590-B

Note:
The 6 turn PS box @jamesroney loaned me came with a pitman arm with casting # C8TA-3590-F.

Thanks for the MPC info. By the way, That 6 turn box has 4 turn internals. (I know, because I installed them.) And the pitman arm was an extra that came from my stash. So there’s no telling where I got it.

 

[Oldtimer]

But you didn't re-stamp tag from "SPA Z" to "SPA AU"
I would suspect all the pitman arms would use same casting, since arm length and twist angle of tie rod hole is static.

 

[jamesroney]

But you didn't re-stamp tag from "SPA Z" to "SPA AU"
I would suspect all the pitman arms would use same casting, since arm length and twist angle of tie rod hole is static.

I think the power steering pitman arm uses a different casting. I think it’s fatter. I’ll have to find a stone stock 73 Stroppe and get a picture. I know where I can find one tomorrow.

 

[jamesroney]

I think the power steering pitman arm uses a different casting. I think it’s fatter. I’ll have to find a stone stock 73 Stroppe and get a picture. I know where I can find one tomorrow.

@Oldtimer I found this one. It's as I remember. Fatter, heavier, and stronger. With "pwr stg" cast in it. And offset the same as the manual one.

 

[Oldtimer]

It is a shame Ford did not make the frame "Fatter, heavier, and stronger" when they added power steering.

 

[Oldtimer]

Stock arm on 68 with manual steering is same casting number. See post 20 for edit.

To end the hi-jack, and respond to @hunter1 original request:
Four turn factory box at center of travel, with factory pitman arm keyed to sector shaft
is pointing at center of DS coil spring (standard width, D44).

 

[hunter1]

Yep, that's the way it is. Thanks to all for the responses and information!