Useful Information
Most all Saginaw & Muncie Trannies have lines on the input shaft.  The number of lines tell you the gear rations.  The chart's below give you the ration info for respective lines.
Saginaw 3 Speed

Lines1st2nd3rd

No    2.85     1.681.00
1      2.54     1.501.00
2     3.11     1.841.00
3      3.50     1.891.00
Saginaw 4 Speed
 
Lines1st2nd3rd4th
 
No    2.84     2.011.35     1.00
1      2.54     1.801.44     1.00
2     3.11     2.201.47     1.00
3      3.50     2.471.65     1.00
Muncie 4 Speed
 
Lines1st2nd3rd4th
 
No    2.56     1.911.48     1.00
1      2.20     1.841.28     1.00
2     2.52     1.881.46     1.00
Second Design T-10 (Super T-10)
 
Lines1st2nd3rd4th
 
2     2.43     1.611.23     1.00
3      2.64     1.751.33     1.00
5     3.42     2.281.46     1.00
6      2.88     1.911.33     1.00
Here is some useful information that is not always easy to find. 
Common Torque (FT-Lbs.)
Mains 70-80Rods 50-65Heads 65Intake 30
Exhaust 20 Oil Pan 15 Cam 30   Carburetor 10
Damper 70  Flywheel 65      Clutch 30 Water Pump 30
Common Clearances:
Main Bearings0.002-.0025"
Crank End Play      0.002-.0025"
Top Ring End Gap        Stock 0.010" Race 0.020"
Second Ring End Gap  Stock 0.012" Race 0.015"
Rod Bearings 0.002-.003"
Steel Rod Side Play      0.008-.010"
Aluminum Rod Side Play       0.050-.070"
Deck Clearance Minimum     Stock .008" Race 0.004"
Piston to Wall0.005-.008"
Piston to Valve      Intake 0.080" Exhaust 0.100"
Oil Pan to Pick up 3/8" No more No less