http://www.team.net/sol/tech/engine.html
Chevy small block V8 575lbs (generic for '60s-'70s motors)
Chevy small block V8 535lbs ('59 Corvette 283 w/alum. intake)
Chevy V8 348/409 620lbs
Chevy big block V8 685lbs Mark IV
thats with all acc.
and more than an assload... more like a buttload and a half!!