My 1941 9N has a differently designed input shaft bearing retainer for the transmission (I think that is what it is called) from the one shown in the F04 manual. The gasket which I got from Ford New Holland is smaller than the original and has ears on it, while mine is square and larger. Also, there are roller bearings on the shaft, not what appear to be tapered bearings in the manual, and a snap ring/C-clip on the shaft, again not shown in the manual. (The seal from Ford New Holland does fit, and I have replaced my tattered original.) The input shaft, which I wanted to use to align the clutch when I put the tractor together, will not come out, without I fear, battling that snap ring. Years ago, in an engine rebuild, I put the clutch back on and reassembled without an alignment tool or the input shaft. Dumb luck? Question, is eyeballing the clutch or some workaround a viable option (still) for clutch reassembly or should I get the 7.00 alignment tool (and probably never use it again)?