what size tourque converts do you run

i am looking to run a 200r4 or 700r4 tranny with my turbo 250

what size should i start with, i ask because most of the places i have been looking at give a free converter with purchase of the transmission.

thanks

Need more info on your combo.


MBHD

Engine: 250 I6 Chevy o Ringed
Block Details:
Bore: .060 over
Bore: 3.935
Stroke: 3.530
Compression: 8.5:1
CID: 258
Camshaft: Crower
Cam # E-68061

Duration- Intake: 286 degrees Lift: .679 Clearance: .026
Exhaust: 280 degrees Lift: .655 Clearance: .028
Lobe Separation: 114 degrees
Duration@ .50 IN: 254 degrees Lobe Lift: IN: .388
EXH: 247 degrees EXH: .374
Water pump- GMB North America
GMB-130-101P
Thermostat: EMP-300-160 degrees by STEWART
Housing: CSR Aluminum
Head: 73cc Mrhotrod6 Intake lump Ported Roller Cam prepped Stage 4 Plus head.
ARP 7/16 screw in studs
Mrhotrod6 Custom Super Duty H Beam 7/16 Stud Girdle
Valves: Max upgrade just below Titanium, Pro Series Extreme Duty Race Intake Valves 1.940
-Special Alloy Inconel Exhaust valves 1.600 Plus .100
Rockers: Crower Enduro Roller 1.75 ratio -7/16”
Springs: Roller Cam Valve springs Chrome Silicone Vanadium
Retainers: Titanium- with the head
Lifters: Comp Cams roller lifters
PushRods: ?
Lifter covers: PES Aluminum covers
Head Gasket: SCE Pro Copper gasket with o rings
Connecting Rods: SCAT- SCA-66000206a 4340 h beam 12 point cap 6.000” in length
Pistons: Ross? CP? Je?
Crankshaft: Stock
Oil Pump: M-62HV High Volume melling
Oil Pan: Track pan made from steel
Oil pain studs: Stainless Steel ARP
Head Studs: ARP Studs
Main Cap kit: ARP
Intake: Clifford Aluminum 4 barrel
Carburetor: C&S Custom Billet aerosol blow thru carb- In process
Turbo Manifold: Custom Welded manifold
Turbo: T3 AR70 with 84 AR turbine
Intercooler: Single pass aluminum
Wastegate: 16lb race products
BOV: 53mm Billet type
Distributor: MSD 8515 magnetic
Ignition: MSD 6ALBTM
Valve Cover: Sissell sheet metal- aluminum
Gaskets: Fel Pro
Bearings: not yet determined
Timing cover: MR hotrod Aluminum 3 piece
Timing Gear: Adjustable machined timing gear
Fuel Pump: Aeromotive SS Electric will be upgraded to A2000
Fuel Regulator: Aeromotive 13301 boost reference regulator
Fuel block off plate: Aluminum
Oil system adapters: Hamburger- block adapter with remote filter mount
Damper: Inovators West internally balanced
Flywheel: Reactor Wheel - Neutral Balance 168 Tooth
Transmission: outlaw 700R4?
Torque converter: ?
Oil/fuel Lines: Icor braided Stainless steel lines with Gold style fittings

About 3200-3600 stall 10" lock-up type converter should work nicely.
What is the trim on the turbine wheel?

But don't skimp out & buy a unknown unproven brand torque converter.

That's my two cents.

MBHD