Closest to the Bay I have been is the Fairfield PnP, but probably all the same. Their carts are quite rugged, built around temp spare wheels, and could easily move a transmission. To pull engines, they have portable chain hoists (never used). Looks like people put engines & such on a metal skid at the end of the row and the workers later move it up front.

Check on-line first so fewer wild goose chases. Their row52 link has photos, date it entered yard, row#. Fairfield had a mythical 300D since that whole row was bare. I usually only go on 1/2 off days (club card), otherwise prices are often better on ebay and my butt stays comfortably at home.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans