Mine is a Delta 17-965 and it has a quill stroke of 4-7/8 inches, FWIW.
You're welcome to take a closer look at it for comparison to the "L".

LOTS of 17-965's out there too. Not a "rare" model whatever that's worth.
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Regards,
Joe Agro, Jr.
(800) 871-5022
01.908.542.0244
Automatic / Pneumatic Drills: http://www.AutoDrill.com
Multiple Spindle Drills: http://www.Multi-Drill.com
Flagship Site: http://www.Drill-N-Tap.com

V8013-R