Links, so hard to sort them all.....

Drawings, trying to organize all this stuff....
http://cdm16397.contentdm.oclc.org/cdm/singleitem/collection/p15323coll6/id/2195/rec/134
(this is the one I started working on 6/9/14)
http://cdm16397.contentdm.oclc.org/cdm/singleitem/collection/p15323coll6/id/2196
(this one is similar to 2195, in fact incorrectly labelled as for Chicago&SouthSide Transit)

http://cdm16397.contentdm.oclc.org/cdm/singleitem/collection/p15323coll6/id/4842
http://cdm16397.contentdm.oclc.org/cdm/singleitem/collection/p15323coll6/id/4843
These two are photos of SouthSide Transit #10 and #13. They appear to be virtually identical.
With the same window scheme of drawing 2195. 

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http://cdm16397.contentdm.oclc.org/cdm/singleitem/collection/p15323coll6/id/2197/rec/142
http://cdm16397.contentdm.oclc.org/cdm/singleitem/collection/p15323coll6/id/2211/rec/17

http://cdm16397.contentdm.oclc.org/cdm/singleitem/collection/p15323coll6/id/2199/rec/152

http://cdm16397.contentdm.oclc.org/cdm/singleitem/collection/p15323coll6/id/1210/rec/328
http://cdm16397.contentdm.oclc.org/cdm/singleitem/collection/p15323coll6/id/1212/rec/337
http://cdm16397.contentdm.oclc.org/cdm/singleitem/collection/p15323coll6/id/1536/rec/413
http://cdm16397.contentdm.oclc.org/cdm/singleitem/collection/p15323coll6/id/1587/rec/420
http://cdm16397.contentdm.oclc.org/cdm/singleitem/collection/p15323coll6/id/4926/rec/116


http://cdm16397.contentdm.oclc.org/cdm/singleitem/collection/p15323coll6/id/2204/rec/3797
http://cdm16397.contentdm.oclc.org/cdm/singleitem/collection/p15323coll6/id/2205/rec/3883
http://cdm16397.contentdm.oclc.org/cdm/singleitem/collection/p15323coll6/id/4941/rec/3940

Just outstanding...Jackson and Sharp photo archives from the Delaware Public Archives. Photos, drawings etc.

http://cdm16397.contentdm.oclc.org/cdm/search/searchterm/Jackson%20and%20Sharp%20Collection/mode/exact

Manufacturer rail products...

Amstred Rail.......
http://www.amstedrail.com/

http://calibreglobal.com.au/
http://www.atlantictrack.com/index.html

Tom has technical section with dimension for train wheels....
http://www.islandpondrailroad.com/tombee/

http://www.clag.org.uk/index.html

http://pennsyrr.com/

http://prr.railfan.net/documents/ModernLocosandCars/

This link below contains some diagrams for the "Decapod", which has a firebox very similar to the 2-8-2 Mikado L1, with useful dimensions.
This is from the July 1917 issue of Railway Mechanical Engineer. An amazing, way ahead of its time, publication. It's hard to see the actual numbers. Guess I'm going to have to buy the actual issue.

http://prr.railfan.net/documents/pdf/PRRDecapodTypeLocomotive_1917_RME_370-373_DennisShort.pdf

National Model Railroad Association
http://www.nmra.org/library/periodicals.html

Where to find Railway Mechanical Engineer publications..
https://archive.org/details/railwaymechanica96newy