Unlike rock improvisation, fusion requires playing behind the beat on purpose. Look for exercises in the PDF that force you to accent the "and" of 3 and the "e" of 4.
He repeats short 3- or 4-note phrases across the bar line. Practice: Take a 4-note pattern from C major pentatonic; start it on the ‘and’ of 1, then beat 2, etc. Scott Henderson Jazz Fusion Improvisation Pdf
You have the PDF. You have your guitar. Now what? Do not read the book cover to cover. That is for musicologists, not players. Use this schedule: Unlike rock improvisation