Try e-gunparts.com
Get a copy of the Gun Digest Shotgun Assembly/Disassembly manual. It should have the Mod 67.
A Sears Moels 300 is a Winchester Model 1400. For a manual, go here: http://www.stevespages.com/page7b.htm For disassembly instructions, get a copy of Gun Digest Assembly/Disassembly for shotguns. Aslo, gunpartscorp.com has an on-line exploded diagram for the model 1400.
There should be a diagram for this specific firearm. In the owner's manual there will be a full diagram of the firearm.
I got one from e-gunparts.com, which is Numrich. They have schematics for many guns.
You best move would be to get a copy of the Gun Digest Firearms Assembly/Disassembly manual for shotguns, available through Amazon.com among other sources.
The Stevens 67 is similar to the Stevens 520, which is discussed in the Gun Digest Book of Firearms Assembly and Disassembly Volume 5 (revised). This book can often be found on Amazon.com or eBay.
Go to http://www.krausebooks.com/category/firearms_knives and purchase the Gun Digest Assembly/Disassembly book for shotguns. The Flight King is in there.
www.savageparts.com has a schematic. I advise against disassembly unless you absolutely have to. sales@countrygunsmith.net
Use the link to Browning for user manuals and diagrams http://www.browning.com/customerservice/ownersmanuals/index.asp
http://www.savage99.com/data_sheets.htm Go here for the diagram-research fee is $4,00 but worth it!!! Happy Hunting!
Rifle, handgun or shotgun?
The owner's manual provides instructions for disassembly to the extent necessary to properly clean the shotgun. Replacement owner's manuals are available on the Remington web site.