I need a new engine (I think)

[Jason Sawyer <jason.sawyer@ibm.net>]

OK, I know that I don't have the original engine in my 79 B. I know
because the motor mounts have spacers installed to put the engine at the
correct height. How can I tell what engine it is? (the plate is missing)

Also, where should I look for a proper engine? I live in Southern
Arizona, and I don't make a whole lot of money. I really want the engine
that the car is supposed to have, or at least one that is like it.

Thanks!

Jason