I decided to cut the very stuck seatpost and stem out of an old Gitane I recently bought for $10. The seatpost is going ok, not there yet but I feel like I will get it eventually.
Once I cut the top of the stem off I realize my hacksaw blade won't fit to cut a slice down the length of it. What are my options now? I've lost all my leverage by cutting the top off, and I was risking bending the fork anyway. I have not tried ammonia yet (Al stem stuck in steel steerer tube.)