Torque Converters??

I was checking out a low mile small block 727 that had been stashed away in the garage for probably around 20 years give or take. Found that it still had the original torque converter. This transmission is out of a 1985 Ram D-150. It is a non-lock up one. My plan is to use this in my Barracuda behind a 408, for now until I build a big block for the car. But anyways the sticker was still on the Torque converter and said low stall.

Anyone know what the stall speed would of been for this torque converter? I know behind a 408 it will be a little higher.

Now I have been starting to look more into Torque Converters and reading more post on the subject on here. The term "Flash Stall" has been coming up more often, why is this important? I'm guessing for a given torque converter it would be a little higher than the stall speed. But what does it mean?


Info on Engine Update:

Magnum block 408
eddy heads w/ valve job now have the same spring pressures
Crane 1.6 ratio rockers
Comp cams 20-604-9; Duration @ 0.050 lift 210 int./220 exh. 0.512 int./0.512 exh. lift, and lobe seperation 112, hydraulic roller
Hughes Air Gap
Headers

Right now the 408 has the Jeep's, fuel injection in place, and is going to keep the fuel injection when it goes in the Cuda.

I'm not sure on tire, depends what will fit and how much of a mini tube I can do with the Fastback. 28" tire probably.

This is going to be a nice daily drive (believe it or not the Jeep is the race car, lol), probably a 3.32 gear, not sure if I want to go to a 2.94 or a 3.55 yet. But it should have plenty of torque to turn even a 2.94. Before the rebuild, I ran a best of 13.391 with it in the Jeep with stock 3.73 gears, a 31" tire, all-time 4-wheel drive. Jeep weights over 4100lbs.