I found this on ebay. It is a Spectra FG39A part.
88 89 Ford Pickup Truck F350 F250 F150 Fuel Tank Sending Unit Left | eBay

 

Another clueless ebay seller. What is the exact application? One type does not fit all.

1988/89 F150/350: There are, at least TEN different sending units.

Mid-Ship or Aft Axle Tank? Steel or Plastic tank? / Gas or Diesel engine?

Regular, Super or Crew Cab pickup or Cab & Chassis? / Which wheelbase? 117" or 133" or 138.8" or 155" or 159" or 160.8"

 

Where would you suggest that someone could find the right part ?

 

Ask here, many others do. But I need to know the exact application.

I've already looked up four of these today for other FTE members, two diesels, 2 gassers.

And waiting for more info for another (2000 SD diesel).

 

1988 f-250 7.3 IDI turbo diesel with engine mounted mechanical fuel pump. - regular cab - long bed- vin:1FTHF26M3JNA85184 - 19gal. driverside metal tank. 19 gal. rear mount metal tank. 2 outlet 2 wire sending units.

 

On 88 f-250 "H", What were the rearend options? Dana ? Sterling ? The metal tag on mine is hard to makeout. What are codes ?