Mustang steering box on a full fendered 28/29

I am building a 28 RPU and can't run the F1 steering box because of clearance issues with my set back Flathead. I picked up a 67 mustang box and weld on mount to mount below the frame rail. The pitman arm is at 12:00 and looks like it will interfere with the splash apron and the fender. Has anyone else mounted mustang box on a full fendered 28/29? What issues will I face?

JMKnight, Nut'n Fitz Hotrods, (Big name, small shop)

 

I have a 66 in mine but i think the only difference is the 67 had a coupler and the 66 has a solid shaft all the way up to the steering wheel. My box bracket in incorperated into the four bar bracket. Hahdling is great. Pics are vague but maybe they will help. I had no clealance issues. The pitman arm is aftermarket pointing straight up but not shown in pics.

 

I had a '29 CCPU, full fendered, and ran the exact same set-up you're talking about. I don't recall whether the pitman arm was straight or had some bends, nor the length, but everything cleared just fine. No bump steer, drove great. Glad to see you're using a traditional fore/aft drag link instead of cross steer. Nothing wrong with cross steer, just no my choice for a hot rod.

Forgot to add, this truck had a 4" dropped I-beam, if that matters.

 

My Dad has a '28 sedan with the Mustang box mounted on the four-bar bracket. I remember the drag link has rubbed on the underside of the splash apron up where it mounts to the fender. If the car was an inch higher in front I don't think it would hit. If it was an inch lower it wouldn't be able to turn at all.

 

Thanks for all your incite. JMKnight

 

I am building a '30 coupe with mustang steering mounted underneath on the 4 bar bracket as well. I have a '67 box with the 1" sector shaft but I couldn't get the pitman arm to fasten in the straight up position without filing off 3 of the splines. So I bought an aftermarket pitman arm by Pete and Jake's but it only fits the '68-70 box with a 1.125" sector shaft. So now I have picked up a '68 box and I am ready to rock. I noticed that the P&J pitman arm is shorter than the stock pitman arm. That may be so that it will fit on a full fendered car without rubbing. It will also make the car steer a little easier which I don't mind because it is a quick ratio box. Hope that is of interest.

 

Good info Ol' Blue. Jmknight

 

if you have an early mustang steering box you will find stangerssite.com very useful. it gets into theory and rebuilding.

 

Good call on strangers.