All due respect you have more of a mechanical (fuel pump, pushrod, restriction, valve springs etc.) than you do a "Jetting" problem. Changing jets are not going to solve your problem.Something mechanical is causing it to run out of fuel at 4000 RPM's.

68 Cuda Notchback [Email]10.86@120[/Email] 69 Charger R/T 440/505 2009 Challenger SRT8