Some one define the term modular?

the production facilities can be altered quickly to produce either one of the motors. ie, if you're making 4.6s in the romeo plant, in a short matter of time you can set up for production of 5.4 motors instead. I'm fairly certain interchangability of parts is not the intended meaning of "modular"
 
enyawix said:
Someone define the term modular. What makes the 4.6, 5.4, and 6.8 engines modular? Can parts be interchanged? If so what parts can be interchanged?
Yes, parts can be interchanged, such as heads, intake, cams....lots of parts, but in some cases, it isn't worth the money and you might as well swap the engine. For instance, you can put 4v cobra heads on a 2v, but for the money and huge PITA, you might as well just swap a cobra engine in.