I have found this one works great when the cheap ones fail:
http://buy1.snapon.com/catalog/item...5&store=snapon-store&dir=catalog
Sometimes they can be really tight, a good puller to put tension on it and a sharp blow with a big hammer usually works.
Hold off on the heat till nothing else works, it'll be better for your steering gear box to not use heat.

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-