Injectors differences and such

IS there a way to visually tell what injectors i have? My car is getting a shortblock this fall and i plan to update a few things the Previous owner didnt, MAF and TB. How can i tell what injectors are in the car? OR should i just order up some 36's for good measure?
 
thanks, i had heard that they were coded, but i didnt know where to find it. Much appreciated

Found this
Fuel injectors are color coded. The color of the injector at the electrical connector determines lbs. per hour. 14 lb/hr are Greay, 19 lb/hr are Orange Yellow, 24 lb/hr are Blue, 30 lb/hr are Red, and 36 lb/hr are Dark Blue