I have an 89 mustang gt convertible, with world heads, 75mm trick flow intake, 1.6 roller rockers, e-303 cam, BBK headers, flowmaster exhaust. I am needing to know what kind of timing set up and fuel delivery set up to go with next or if I should start somewhere else for my next upgrade. my goal is to have a street legal 11 second car that i can cruise. any advice?????????  

are you planning to use nitrous or boost to run 11s, or will it be N/A?  

i plan on later putting a procharger on it  

Timing and fuel huh?

Timing- Get an MSD 6BTM or Digital 6 and an MSD Blaster TFI coil.

Fuel- 24lb injectors will do the trick now, but I'd recommend at least 42 pounders when you get the blower on. If you're just planning on 11s with your combo and a procharger, get a walbro 255 fuel pump, 42lbs injectors, and a matching meter (ABACO DBX would be cool) If you don't already have an adjustable fuel pressure regulator, get one of those too.

Get a good dyno tune AS SOON AS YOU INSTALL THE PROCHARGER.

This should get you on the right track.