2k wont get you squat. 1k will be in cylinder head repairs, welding up the damage (if it can be repaired!) K-lined guides with new valve seats fitted & re-cut (they'll be stuffed), milled, new steam seals, possibly new valves (expect the stems to be shot). 733A cam is around $250 & you can retain your original springs & lash pads.
Don't bother with a 30yo old flogged out 280ZX / MR30 elec dizzy - they are more trouble then they are worth. Get a BRAND NEW Performance Ignition distributor - $800. Get is tuned PROPERLY by someone who KNOWS what they are doing. In the end, performance doesn't come cheap - how fast do you want to go?