360 driveability problem

Well.timing Chain Showed 8 Degrees Of Play Before The Rotor Would Move.so I Installed A New Chain And Sprockets.no Improvement.did Away With Vacuum Advanced.set At 36* At 2500 Rpm
Still No Improvement.any Ideas What I Am Doing Wrong.or What I Should Do.
Have Been Thinking Of A New Motor And Junking This One.but Can't Afford Crap Right Now.twins Are Getting Expensive.7 Months Old,crawling And Into Everything.gotta Love Fatherhood