Originally Posted by Cuda_jim

It's likely an IDI Turbo.
If it says "FORD TURBO" on the Engine cover it's an IDI Turbo (InDirect Injection)
If it says "Direct Injection Turbo" it's a PSD

You can go here and put in your VIN, the 8th digit tells you what engine you have:
If it's an "F" it's a Powerstroke, can't recall what the Turbo IDI engine letter is.

https://www.ford-trucks.com/vin-decoder/index.php