This is back from when I first got my mustang. The only mods at the time were 13* timing, offroad h-pipe, flowmasters, MSD blaster coil, k&n filter, and underdrive pulleys. These are SAE but my STD numbers were 225hp/295tq, so not a huge difference.
My best 60' so far has been 2.03X. I'm on 315 Nitto DR's and I also have Tokico Illumina 5-way adjustable drag struts up front. I still am not happy with my 60's, soI'm only dragging on ET streets this year.
And of course there's more stuff planned. Since then I put in a McLoed DF clutch, an Autologic chip, aluminum driveshaft, & densecharger. I didnt notice a significant increase in power or trap speeds from any of those mods though.