Yes but with your mods it affects you a little less. Upping the volumetric efficiency of an engine like you have with cams, makes the engine suffer less for atmospheric changes.
Still affects you more than a boosted car, but less than a simple bolt-on car.
For an in hand calculator, consider "iDrag" by Vincent Pizzo on the iPhone/iPod Touch. Tons of stuff in there to estimate results you are speaking of. Also look at "Garage Buddy" by Turtle Rock Studios.
You of all people are asking this question? LOL I thought you knew this stuff inside and out That DA will affect your times by about .35 or so with your mods.
When I was in Geodetic Survey School in 1984, I looked at the bottom of the T-3 Theodolite and noticed the 1963 Mfg Date. I asked SGT Bethea (our Instructor) about the technology level we were learning. His response was something along the lines of "Pvt, you are learning on state of the art equipment", and smiled.