I used the search with limited results.

How many ohms are the fuel gauge senders in the first gens? I know the older trucks are 73 empty - 10 full. Are the first gens the same?

 

I have the specs in my manual from building a second tank, I think its 120 empty and 10 ohms full, ill post the aftermarket sender number too when I confim the resistance

 

Factory specs:
Empty stop = greater than 96.5 ohms.
Empty graduation = 90 ohms +-3
1/2 = 45.3 ohms +-3
Full graduation = 12 ohms +-3
Full stop = less than 8 ohms.

 

So if I want to order an Auto Meter gauge, should I get a 73-10 or 0-90 ohm?

 

0-90

 

looking through my receipts, I used a vdo sender, it had 7 - 20 plus inches of depth adjustment for my custom tank, I adjusted the arm to get right to the base towards the back, showing any fuel left in it, the arm is reversible so you can get 0-90 or 90-0, of course, I put it in showing full tank on empty