I've been hunting down brochures and manuals for the L&S Model A lathes. Here are some numbers:
L&S Model A 14 Engine lathe:
Swing over bed and carriage wings: 16 1/2"
Swing over cross slide: 10 1/2"
Center distance: 30"
Key drive spindle nose size: No. 1
Spindle through clearance: 1 3/4"
Morse taper of centers: No. 4
Spindle speeds: 12
Spindle speed range: 18-540 RPM
Threads and feed changes: 55
Motor horsepower: 7 1/2
Machine net weight: 5400 lbs. (I was guessing 3500# but it's a lot heavier)
It can swing 16.5 inches over the ways, which is more capacity than I figured on.