A904 lockup converter help

I have a 72 duster! Iā€™m trying to figure out what the best stall speed would be on my a904 build. I have a supercharged 318 with 8 pounds of boost, msd fuel injected, tire size ā€œ245/60r15ā€, 3:55 position rear, 8.64 compression, 302 head castings, stock valve size but the heads have been ported, not sure on flow numbers, comp cams grind# crs 268h-10

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