how difficult is it to take a 302 carburated motor and change it to a fuel injection set up? any advice would be great!

 

Just the motor?

Replace the intake, put on heater tubes, put a blocking plate on the timing chain cover. It's the rest of the stuff that takes a lot to move over - fuel pump and pickup, fuel lines, sensors, computer, harness, etc.

Or, you could buy a digital system for ~$3K. Those are pretty simple.

http://www.mass-floefi.com/