Exclamation in my Lumina SS (Like GTO and Commodore) th350 or th400 ??

[ss2002]

Hi,
my car Lumina 2002 SS

I want to change my 4l60e to th350 or th400 ...
what is the best choice?

I driver my car daily go to my collage ...
this is the parts on my car :
LS1 5.7 Stock intake LS6
AFR Mongoose 205cc FULLY CNC 66cc Chambers COMPLETE|G5X3-114|Stainless Works 1 3/4 Off Road|Nitto 555 245-45R17|LS1 Breather|SLP Double Roller Timing Set|NGK TR-55 Spark Plugs|SLP Heavy Duty Oil Pump|ASP Pulley Set|160* T-Stat|MSD LS1 8.5mm Wires|Vigilante Converter 3200 Stall Multi-Discks|SLP GTO Linelock|TCI Automotive SFI Approved LS1 Flexplate|Pro-Built 4L60E Rebuild Kit Pro Street w/vacuum modulator
3.73 with LSD | 3'' Dual with X-Pipe catback Surefloexhaust



my ET in 1/4 mile is 12.345
ELAPSED TIME 12.345
VEHICLE SPEED 112.39 MPH - 180.87 km
60 FOOT ET 1.877
101 METER ET 5.136
201 METER ET 7.901
305 METER ET 10.312
and in Dynojet make 406.82 hp / 373.65 torque (4l60e)unloked Vig3200

my car weight around 3647

What it the time in 1/4 mile , Hp and torque I will take with th350 and with th400 ?


I Will put 150 HP Nitrous I will be in 550 rear HP

Please help me what better for my car ? 350 or 400 ? and why
Note: i will use TCI Low Gear Planetary Sets First Gear Ratio: 2.75 Second Gear Ratio: 1.57
...

[lumina01]

pm sent mate