Well I have been at it for about 3 hours... and NO DICE
I tried heating until I was blue in the face and nothing. I used ice to cool the pin with no results. I needed to go more drastic. I decided to weld all tread on the end of the pin and then use Ken's idea above. It was tough welding (took a lot more heat then I first guessed) and the second time I got a good weld/penetration. I used a socket and washers and tightened the nut and it just broke the all thread... I then welded a nut on the stub of the all thread to see if I could get it to turn, nope just broke the all thread again. I was careful not to damage the pin because I thought I might not succeed so it is still in good shape where the bell housing sits on it.
I think the pins are fused in the aluminum... I guess I can try welding a grade 8 bolt the with the head cut off but I am not sure it will work. Also was hoping the bottom pin had a hole in the front where I could drive it out, but nope a blind hole. I could drill into the block and then drive it out but I am not sure about that.
I am leaning towards Rick Lakes idea above about drilling 2 new 1/4" locating pins right now as that seems to be the only solution and the pins are still pretty well unmolested. I have been scooping out a good place to drill and it looks like the top of the BH seems to be the best place but I need to spend some more time on it to make sure.
If anyone has any more ideas or suggestions keep them coming...
Russ