Id say that 8 could be very close to 150, hes short on brows but mass and beam length will tell the story. Id. Also agree that he is more than likely 4.
It does take a big 8 to make 150, we are blessed with great 8 point genetics and ive got 2 over and one just under. Ive gotten to look at alot over the years.
Good luck with him, if he gets your heart pumping then run an arrow through his