springs - 5k vs. 5ktq

[Ameer Antar]

Does anyone know if 5ktq springs will replace 5kt springs? I looked up the 
rear springs and they had slightly different #'s. The tq is the same # w/ 
an 'E' on the end. The 5k, 5kq, and 5kt use the same part #.  What is the 
difference on the 5ktq, and does it prevent you from using it?

TireRack has H&R's that only show for '86-'88 5ktq. There's no springs 
under 5kq's or 5kt's. But I've seen other places advertise for all the 5k 
models...what's the best option here? Thanks.

-ameer
'84 5kT