Work on your 60ft times. Bump timing to 14*. Slip the clutch. Undo the front sway bar for better weight transfer.
Suspension/chassis mods. Do you want a track only car? Street/strip? Brand recommendations would be based on specific answers. Best
suspension mods would be some adjustable struts/shocks. Then there are rear
control arms,front and rear springs,and if you haven't already done them-subframe connectors(#1). If/when you are going to replace the rear
control arms(and before my next recommendation) buy a torque box reinforcement kit.
Tires!-I like a soft bias ply for a low powered manual trans car,like m&h,Hoosiers or Mickey T's. You can get a dot version that you can drive to the track,drop air pressure to around 15#,race,air back up and drive home. They are absolutely horrible on a wet road but work fine otherwise. They won't last very long but are singularly the easiest upgrade to better times.
Also your car doesn't need 24# inj. You are probably running rich which will cut some power. You have plenty of induction/fuel system. You would see major power increases with a head,cam and exhaust system upgrade. Approximately 1-2 seconds off your posted times if done right. You also say shorty power pipe. Do you mean the type that keeps the open air cleaner element in engine compartment? This is a no no. It sucks hot turbulent air from the engine. Not a performance upgrade. Get a unit that puts the element back in the fender.