Lowered D250
#12
#13
Yeah, thats because the 318 and 360 are close enough in weight that they didnt bother with heavier springs up front in 3/4 ton trucks. The stiffness is needed in the back, where the load will be. I have a 1 ton, and I am not so sure that my front springs are any different than my buddies 1/2 ton. Spring length (eye to eye) will be the same with all of your options, I believe.
#15
Not all D series springs are the same!
I had to replace the front coils on my heavy duty D-250 with a Spicer 60 full floater rear axle and they are slightly heavier wire diameter, slightly larger outside diameter than light duty 250, which are slightly bigger in those dimensions over a 150 front coils.
But I think the differences in outside diameter are not enough to stop them from being swapped.
Source: O'Reilly Auto Parts online.
Budd
But I think the differences in outside diameter are not enough to stop them from being swapped.
Source: O'Reilly Auto Parts online.
Budd