I don't remember the name of the place, but I had to pick up a tranny at a fairly large facility down towards Philly. I believe it would be on the northwest side of Philly, since I didn't actually get into Philly. Wasn't too far off the thruway.
Junkyards in Del Val area What kind of yards are you lookin for exactly and what kind of stuff do you need,I know the contents of a few yards in the area.
You can call Joe at Mike's Junkyard in Southwest Philly 1 215 492 1885. They helped me out once, and they have a 67 Gran Sport in the pile.
Harry's U-pull-it Harry's U-pull-it in hazelton, pa. Prices are ridiculously cheap but bring your own tools, have $2 to get into the place and be prepared to sign a waiver stating you won't sue them if you hurt yourself. I don't know if it's within 100 miles but if not it's just barely over.
Parts? Ther is a place in north jersy, above flemington, called cars inc., not a yard, but a parts supplier, they have a lot of nos and used ---on the web at oldbuickparts.com