tax time...what should i get?

well, as most everyone else, i want a lot of things for my car, thus making the decision rather complicated for me. i'm not working with a whole lot of $$$, and i don't want to spend it all on my car. i've got a couple different ideas i'm tossing around including the following:

1. SSBC rear disc brake conversion from LMR
Mustang 87-92 Rear Disk Brake Conversion Kit, 4 Lug, With Slotted & Plated Rotors by SSBC at LRS - Same Day Shipping!

if i get the rear disc conversion, it'll probably be all i get.

2. Edelbrock E street heads.
Ford E-Street Cylinder Head, 5.0/5.8L With 2.02"/1.60" Valves & 60Cc Combustion Chamber, 170Cc Intake Runners Pedestal Mount - Sold As A Pair by Edelbrock at LRS - Same Day Shipping!

or

Ford E-Street Cylinder Head, 5.0/5.8L With 1.90"/1.60" Valves & 60Cc Combustion Chamber, 170Cc Intake Runners Pedestal Mount - Sold As A Pair by Edelbrock at LRS - Same Day Shipping!

i haven't decided on 2.02's or 1.90's. this one is still kind of iffy because i don't want to spend that much of my return on one thing, and if i'm going to drop that dough on some heads, i'd really rather save up and get what i really want which is some twisted wedges.

3. Dyno Tune nitrous wet kit
New 87-98 Mustang GT Nitrous System : eBay Motors (item 220548930659 end time Feb-04-10 13:58:30 PST)

not that exact kit, but the same one. i've heard nothing but good about dyno tune kits and know a few people locally that run them. if i go the n2o route, i'd get a purge kit, window switch, etc to go with it.

4. new weatherstripping and window tint
Mustang 87-93 Weatherstrip Kit, Coupe/Hatchback by 50resto at LRS - Same Day Shipping!

i need new run channel liners and door belt weatherstripping so i figured this kit would be a good choice. right now they leave streaks on my windows when i roll them up or down so i dont want to get tint until i replace them. after i do that, i'll get 15% sides and back and 5% on the quarter windows. this is the cheapest route so far so i'll probably get a new rack and pinion which i need along with a bumpsteer kit.

5. Moates Quarterhorse
QuarterHorse for Fords [QH1] - $249.00 : Moates.Net

i'd also have to purchase a binary editor and i'd probably get a wideband as well. this one is a little more intimidating because i have no clue how to tune a car but really want to start to learn how. i know it's a little unnecessary at my power level but i've always wanted one and i change parts around pretty often and don't want to have to pay for tunes all the time.

6. BBK ceramic longtube headers and offroad X or H pipe or pro chamber

you guys would laugh if you saw my exhaust setup. SUPER crappy Hedman longtubes with 1 1/2" primaries and 3" 3-bolt collector. so crappy i had to jack them up to get them to bolt up and the driver's side header was bent so bad that my exhaust guy had to beat on my floorboard so he could get the even crappier midpipe to bolt up to it. NON-mandrel bent H pipe that's been cut and welded on so much it's horrible. and since the driver's side header was bent up and towards the side of the car, there is a big "S" curve right there in the H pipe.

7. just a bunch of little random things like Redline Tuning hood struts, rear girdle, floor mats, steeda radiator support, etc.

if you have a different suggestion let me know! because i still have no idea!!

sorry i typed so much

i WANT to spend as little as possible, but i'm WILLING to spend up to maybe 700-800 depending on what it is.

how can i do the conversion cheaper? i don't really know what all is necessary to do the conversion, and i want to stay 4 lug.

well i found a 4 lug rear disc conversion kit from North Racecars for $600 shipped directly from them. doesn't include a master cylinder though, which i assume i'll have to change. will i need an adj. prop valve and what not as well? here's the kit...North Racecars Brake Solutions. i'd get the complete 4 lug kit minus axles for $549 + shipping.