ENGINE WEIGHTS

The weight of the Ford engines has been published in various books and web sites. Weights vary depending in whether all engine accessories such as alternator and smog are included, and whether the engines are wet and ready to operate (oil, fuel and water incl) or dry.

Here are some indicative weights, plus a couple of websites with more data

From Boss and Cobra Jet Mustangs. (John Craft)
429 Boss - 635 lb
429, 460 - 720 lb
352, 390, 427, 428 - 625 lb
351 Clev - 525 lb
302 Boss - 500 lb
       289 - 480lb? (My Guess)

 From published Ford figures - Here.  http://tc.ne13.com/FordEngineWeightsV1.html

427 - 658 lbs
429 - 677 lbs
351W - 581 lbs
351C - 604 lbs
302 - 470 lbs

Here’s another good source with engine weight data across numerous makes and engine types.
http://www.bacomatic.org/~dw/library/txt/engfyi.htm