Don956

New to this place, so hi all. Got a problem i cant figure out. Bought my boy this 03 vert. Had a very bad running engine. Ran compression 190-200 on all cyl. Replaced coils and plugs. No change. Replaced injectors, got better but still acting up. Pulled front cover and retimed . No change, did replace slides. Deleted egr, cats and resealed bbk headers. No change. Have a snap on verus and shows no misfires in mode 6 and no sensor codes. Alt tested bad but light wasnt on on dash. Replaced with new ,no change. Now what it does is misfire on startup and only when revving quickly. On takeoff engine boggs then comes to life around 3k. Will lay rubber going into second. Fishtail kind of rubber. Fuel pump and filter are new. Pressure is constant at 40psi. Crank and cam sensor are new and so is maf. It also idles perfect. No misfire at all. At my end with this car.. any thoughts?