A Complete LS1 Re Build ?

[FerrariT]

Just got a 98 ls1

stats as I was told:

425 Hp (at flywheel?)
GM Alum cylinder Heads (later casting) - ported / shaved about 7 thousandths with machined valve guides.
LSM 226/230 camshaft
Manley Dual valve springs
ferrea stainless valves
cloyes timing chain and gear set
fly cut pistons
NGK tr6 plugs
cometic head gaskets
etc,etc

Does not have an intake as of now ...

mileage:
1500 on the upper
100k on the lower

My desires:
About 700 HP+ (give or take)
turning the block into a 383, so need to pick a crank.
Turbo charged

I wish to keep it fuel injected.
Need to pick the right headers as well.
It needs a new intake.
Uncertain if I should go automatic or manual? [the project car is an auto as is but ...]
700r4 ? or t-56 ?
All t56s Ive seen are about $2500 plus on a used tranny.

Not sure where to begin at with the build.
I don't wish to just carbon copy someone else's LSX build.

the engine will go into a 3rd gen nova.

first build ever, the goals are high but I love a challenge and none shall sway my determination.