Si and HF axle question

I am looking to put a 90' Si(D16A6)engine/tranny into my 90' HF. I need to know if I can use my wheel knuckle and hub assemblies from the HF with the Si axles? Or, If I can use the HF axles with the Si tranny?

you need to swap to dx/si knuckles and run the si axles, and thats because i believe the si/dx spindles are bigger than the hf. either that or they have more splines, i forget. hope that helps some
peace