My dad used to have an old SAAB 900 Turbo Convertible and I could have told you where it was from but Mazkid beat me to it.
I saw an Echo at a car show with a highly modded Celica GTS engine. and considering the Echo weighs 700lbs less than the already frighteningly light Celica, then I'll bet its a screamer!
PS The Celica GTS weighs 2,500lbs exactly, and the Echo is a shade over 1,800lbs.
I would love to have that as my car considering it would spank alot of rice rockets, especially if the engine has any real power like upwards of 300! With a turbo it would be a synch!