Take of the ECU pentastar connector or take off the dist to coil secondary wire at the dist end and ground it then crank it & see if you're good. As said this'll confirm/deny that it is a timing prob. I'd put a breaker bar on the crank bolt & check turning resistance and I'd take out the plugs and see if it turns fast and if doing these I'd for sure take off the intake & regoop the cam. After all of your investment I would not sweat a new bathtub gasket and a bit of labor and some even reuse them (not me though).