Used to be able to get them at Auto Zone and Advance Auto Parts... they don't carry any Grant stuff anymore.

I've got an 84 D250 with the wheel below. Anyone know the number of the kit I need to track down & where I can find one?

 

Summit lists 2 different kits, but the application for both kits are to the same wheels...

http://www.summitracing.com/parts/GRT-4316/

 

Though that only shows these:

W150 PICKUP
RAMCHARGER
W250 PICKUP
W350 PICKUP

It'll fit right?

 

Should... I was looking for stuff for my truck when I saw those, but the only difference between the D150 and the W150 is 4x4. To be completely certain, you could always call Grant.