From reading about the SpaceX program there are remarkably very little left of the Apollo program engines. Having a real model even in disarray would be a useful study.
http://www.nasa.gov/exploration/systems/sls/f1_test.html
Still awesome to get some of the old ones back, though!
http://campl.us/jisP4TQtMJg (Alamogordo) http://campl.us/i26CYMtwf8K (Woodland Hills)
* In decades past, during development of the Apollo space program, Rocketdyne tested engines at its Field Laboratory test facility in the Santa Susana Mountains a few miles West. The sustained outdoor roar of those engine tests was audible better than 7 miles away. Source: My elementary school classmates, blase about the whole thing, saying "Oh, that's just Rocketdyne testing again".
* Lots of facility pictures of several of the Rocketdyne facilities (with engines under assembly) in the Rocketdyne Archives [2]
* It's a safe bet the name "Rocketdyne" would be a portmanteau of "Rocket Dynamics".
* Some rocket equations and stability discussion at [3]
[1] http://www.dailynews.com/ci_21138479/pratt-whitney-rocketdyn...
[2] http://www.rocketdynearchives.com/canoga.html
[3] http://earthweb.ess.washington.edu/~space/ess472/Lecture_Roc...