Cheap used engines

[MT nester]

I have been looking at beat up work vans for an engine when I build my Cobra.
That will be august 2009
There are several full size vans on craigslist in Tucson and Phoenix.
750$ for a '94 Ford W/ 351EFI & O'drive auto.
There are buncha' Dodges W/ EFI 360's.
How would that be, a Chrysler engine in my Cobra.
I am not seeing the importance of the whole "correct" thing.

Wasn't the Cobra kinda' rigged up outta' a buncha' parts from allover the place and some tubing?
Carrol Shelby has put his name on many marquis over the years.
I had a Shelby model Dodge Charger (the little FWD one)
I bet the only reason Carrol used a Ford motor is because he got a good deal from them.

I am going to build my Cobra from scratch,out of whatever I can find cheap... And then drive the hell out of it. EVERYDAY!!
I think THAT is the whole point of Carrol Shelby's greatest creation!!
How about a T-C AWD 2.0 L. Mitsubishi drivetrain in my cobra??