99 379 Fuel gauges with selector switch

Shop did it, just loosened straps, tilted over and replaced. Pickup/return is a separate port?

 

Good luck getting the straps loose without breaking the bolts

 

Absolutely, probably need heat too

 

One trick to help with the strap bolt is put two nuts on the end and lock them together to hold and help keep the stud from twisting. Its the twisting that breaks them more often then thread stretch. Once you get the factory nut loose and get it past the first 1/4 inch of threads you are usually home free.

Soak, clean , and a little propane heat will help it along.

I also recommend getting the ball float in tube type sender. Much more acurate and longer lasting in todays watered down fuel.