Possible converter damage???

[Greg Reimer 7376]

Sunday,I took my Chevelle to Irwindale for Summit Race #3. Car is a 327,250/245 horse, large journal steel crank, Powerglide trans, 8 3/4 converter, not sure of the make, 5.38 gears, etc. etc. and on the first time only, the engine let go about 250 feet out. It locked up solid. I instantly shoved the trans in neutral and rolled off the end of the track and off the first return road. No oil on the track, water in the oil, etc, engine is locked up solid. A 3 foot breaker bar wouldn't move it either direction. I was wondering if the sudden engine failure hurt the converter. It wasn't all the way up in first yet, probably 5-5500 max,car didn't lock the rear wheels for a bit, just wondering what you guys think if I hurt the converter. I'll probably pull the engine in a weekend or two. Not what I needed. ('>')?