G. M. Best's IRCA roster from his book _Central American Holiday_ may not be definitive, but it is a good starting point.
IRCA 40 - 41 Baldwin, 1920.
Drivers - 38"
Cylinders - 16 x 20"
Engine weight - 93,400#
IRCA 42 - 44 Baldwin, 1921. Dimensions identical to 40 - 41.
Entire group of locomotives with these specs are 35 - 44 in Best's roster.
IRCA 107 - 113 Baldwin, 1926
Drivers - 40"
Cylinders 18 x 20"
Engine weight - 102,800#
Entire group of locomotives with these specs in Best's roster are 101 - 125. (Mikes start with 126).
Best lists another group of 2-8-0s, Nos. 61 - 73, built between 1909 and 1914, similar to Nos. 35 - 44, but engine weight given is 38" drivers, 16 x 20" cylinders, but 91,000# engine weight.
Cheers!
Charlie Mutschler