Turbo- need help---to draw up a plan

While removing undercoat from a 72 Swinger

thinking about the power train,
What to do...

Goal> Turbo charged, Streetable, drive to the track

I have been reading, but still know little about turbos

kinda working this project backwards> Starting at the rear

using what we have already

Narrowed 8 3/4
gears- 3.23, 3.55, 3.91, 4.56

Wheels- Welds 15 x 10 with 26.5 x 12 MT Street
15 x 4 - 26x5

right now,
We are installing frame connectors
tubs
moving the springs into the frame.

next will be to mod the floor for a trans safety shield (some floor replacement)
also we are going to mod the trans cross member area for a A-500 or A518

trans available are
A-999, 727, a500, a518
have a 3500 convertor for the 727 or a518

fuel> E85

exhaust
Truck magnum Manifolds (1991)
magnum truck shorty headers
or have a set of custom headers


Engine

fresh, not finish assemble 340
10.5 comp
ported eddy heads
air gap- will need carb
No cam
H/S rockers

or
new
Indy headed 340> 449 c.i.
270 duration 650 lift solid roller
14-1 > can change pistons, never installed yet

This is what we have to work with

Any ideas what to do? :burnout:
turbo size?
carb?
trans/gear ratio?

Thanks

We bought the car with out an engine or trans.