73+ drop spindles on 71-72

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I read a thread asking a similar question a while back and now i cant find it. I currently have the 71-72 crossmember/arms/tierods/ball joints etc..

theres some 73+ 3" drop spindles on craigslist...is it true that i can use the 73 drop spindles on the 71-72 components if i just switch the outer tie rod to the 73' type and change to 73' lower and upper ball joints.

i also heard that runnin 3" drop spindles with 15" wheels might require shaving of the lca for full steering ablility.

can anyone confirm this for me? thanks