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Well, I don't have any reference stuff here but since you're been waiting so patiently how about a guess at something like 9.59" or so, it sounds familiar.
I believe ford made a few different lenght pushrods for the non adjustable rockers, I believe the standard lenght was 9.620, but they also made a 9.590, 9.560,9.770 lenght pushrods. I lenght this lesson very well when I installed a taller lift cam and use 9.620 lenght pushrods and burnt up my cam. I did not find out tell after I did this and pulled of my heads to find out my heads had ben milled .010 so be very careful when buying push rods when using non-adjustable rockers!!