[ta man]

Those times are they with those heads or previous times.If SD did those heads call them for a cam>run as much lift as your springs will allow.I'd definately install a good fuel pump like a Mallory 140.This just for starters.To run elevens you'll need a good fuel supply,excellant traction,decent 60ft like a 1.6 or 1.7.You may need to upgrade your fuel lines>I'm running 114.59mph with a Mallory 140 with stock lines but I'm upgrading to larger lines and fittings this year.You may want to have 3 inch exhaust off the headers back to the mufflers.Think about upgrading your torque convertor to give you more jump out of the hole and better coupling down the track.If that 2500 is a generic brand you may be blowing through it down the track and losing mph.It took me 6 years to get my car from 14.2 to 11.88.I learned alot you can do it all at once or little by little.You have the basics > a 455 ,good heads,3.42 gears now just set up everything else.Good luck.