Actually, its a built up 426 Wedge, but its still really sweet. It originally had a 440 in it, but Bud pulled that motor and set it aside so that if something was to happen he wouldn't ruin the original engine. The 426 is built up though, probably make MORE power than a factory HEMI did.
Its a shame you went able to get more info out of that guy... keep looking, you'll find it. I found my 64' on collectorcartrader.com, they usually have a good number of Fords in there. cars-on-line.com has a bunch of old Fords too.
I love those 64' Galaxies... thats why I own the smaller version of it.