"Yawn"

You got to much time on your hands

<snip>

                                ___________________
                         /|  /|  |                  |
                         ||__||  |      Please do   |
                        /   O O\__         NOT      |
                       /          \     feed the    |
                      /      \     \     trolls     |
                     /   _    \     \ ______________|
                    /    |\____\     \     ||
                   /     | | | |\____/     ||
                  /       \|_|_|/   \    __||
                 /  /  \            |____| ||
                /   |   | /|        |      --|
                |   |   |//         |____  --|
         * _    |  |_|_|_|          |     \-/
      *-- _--\ _ \     //           |
        /  _     \\ _ //   |        /
      *  /   \_ /- | -     |       |
        *      ___ c_c_c_C/ \C_c_c_c____________

Why don't you dump the Neon and get a Charger R/T with the R/T package?
It can go 150MPH and way better on gas than the gutless 3.3L.

okay, now that everyone has done their fair share of griping and
naysaying instead of actually HELPING you with your project, however
grandoise, it's a pretty cool idea.
i had a 1992 chrysler lebaron, and FOR A GRANNY CAR, it was a bad
bitch, also coincidentally, i now drive an 01 neon SE, which ive
extensively modified for autocross.

im not much on the mechanical department, but i'm pretty good with
suspension.
and this project is gonna take ALOT of suspension work
consider this:
the neon already has roughly 65% of its overall weight in the front
end, slap in a heavy a.s older six cylinder motor, and your gonna have
the most tail-happy car on the road.

first things first
your gonna need to stabilize the chassis and weigh down the rear a bit
heres my recommendations, and i tried to keep it cost effective while
keeping performance in mind cus i dont know what kind of budget your
working with

-24mm Progress Technology front and rear Anti-Roll Bars[$200 @
streetbeatcustoms.com]
-Tokico HP (Non-Adjustable) Performance Shocks/Springs Suspension
Kit[$400 @ racinglab.com]
-eibach pro-alignment & camber kit[$30 @drivewire.com]
-Energy Suspension HyperFlex Master Kit [$100 @
energysuspensionparts.com]
-vibrant performance strut tower brace[$60 @ jcwhitney.com]
-TTI Racing lower control arm brace
-GET NEW ROAD RACING STYLE OIL PAN BEFORE GETTIN LOOSE AROUND CORNERS!
-BIG f.cking BRAKES!!!!!!

now that you've got that worked out, simply bolting down some lead
weights in your trunk should settle your weight distribution issues

take your car to a weigh station before installing the engine block,
and then take it in afterwards. then subtract the original weight from
your new weight, and put a little under that amount of weight in the
trunk

i also recommend using the biggest radiator you can fit in there and
getting a nice air intake and intake manifold

Ultimately do-able, but the cost may well make it more reasonable to just
buy a different car that already has the power & handling you want.
On the other hand, your project car would make a hell of a "sleeper"...

This is absurd, but it's your money. A 2.0L turbo could put out far more
HP than the 3.3L, get better mileage, and will fit the car with little
or no mods. More of your $2500 budget would be used to make your Neon
really fast.