I have owned a 90 LX 5.0 with most of the same mods that guy has, minus the 410 rear end. I can tell you from owning the 5.0 to the GTP you will spank his a$$ in the long run, he will get you off the line if he is able to get traction, but you will reel him in. Just my opinion, oh and E7 heads ported or not are junky poop. Now if he had GT40P heads or AFR's and tune, that would change the game.