Should I sell my stang and get a notchback???

[Dark_5.0]

As some of you already know my car is slow as hell I have ran a best of 15.2 @90mph.
and that is after some mods and "NO" it is not my driving.

When I bought my car i did not know what I was doing I thought that the vert would be lighter than the hard top boy was I wrong.

My mustang is not street drivin hardly at all
it is mainly just to take to the track and have fun with just recently I thought that I was going to dip down into the 14's when I went from 2.73's to 3.73's but guess what now I run a 15.4 @90 I am actually 2 tenths slower than I was before.

I have learned alot about stangs since I have joined this site and now knowing what I know now if I was buying a stang today I would buy a 89 or up notchback so that I would have a light weight car with mass air.

I am fixing to come into about $1,000.00 should I spend the grand on the vert to make it faster or should I sell the vert add the grand to it and buy a notch.

If I spent 1000 bucks on my verts motor, I am guessing that about half of that would have to go towards a mass air conversion kit
would I be able to outrun a stock Notchback.
and also other than a mass air conversion kit what mod would you reccomend.

Thanks in advance,

------------------
88 mustang gt convertible bored to 306 BBk equal length headers mac cold air fender kit 3.73 FMS gears cowl hood nitto drag radials ford racing clutch flow masters h-pipe 160* thermostat 16 degrees of timing electric fan off 94' t-bird jacobs electronics cap and wires. Edelbrock 1 1/2 inch drop springs.