Question regarding torque converter

I have a 73 Dart Swinger that I am putting in a 1978 360 with a 904 trans rebuilt with TCI trans kit and shift improver kit. Engine is stock except heads were reworked (not ported, just valve job, milled to true, EGR capped) Cam is a crane C cam specs are sumtin like 288 288 .456 lift not sure overlap, aluminum single plane streetmaster, Holley 600 4 Barrel vacuum secondaries, 1 5/8 headers, 2 1/2" dual exhaust, 8 3/4 rear with 3.23 sure grip, 15" rims with 29 or 30 tall tires.
My question is, a buddy of mine thinks that the stall converter from the stock /6 with 904 will work fine behind the 360 in the 904 setup. I have the B & M flexplate so balance is not issue. Will this converter stall higher like he thinks because it was for a slant 6? Will it survive? Any help would be greatly apreciated.