ID this FED / Funny car steering box

Can anyone ID this steering box?? the guy i bought it off of thought it was a P&S box, I'm not so sure, the housing is aluminum and the only identifying marks and the numbers 203.56 . Its a worm gear design similar to a Schroeder but has tapered roller bearings inside, it has a 6 to 1 ratio, the bronze bushing under the roll pin for the pitman arm i added to preload the bearing on the inside and is not original.
Thanks

 

Looks like a early SPE unit

 

im thinkin spe also.

 

I have a P&S and it looks different.

 

All SPE steering box's were billet alu, Probably a Huzar/RCS. I had one simular to that in a do***ented RCS ch***ie and then I also had a RCS box(cast with the RCS name) that was a direct copy of the P&S.