Sometimes when you write a question, it's difficult to see how it comes across. To paraphrase:
"I like program X, but want to change it so it will accomplish completely different goals than those it was designed. Can I omit days and randomly substitute exercises, and get the results I want?"
Don't mean to be rude, but if your goals are "to get stronger and bigger", as you say, why not choose a program that is designed to do just that?