Planning on adding some spacers and was wondering if adding spacers will require an alignment

 

no, you won't need alligment on either of your trucks.
not to high jack but a cpl wks ago i posted re: spacers and if they will wear out front wheel bearings quicker on ifs trucks and got zero response...anyone?

 

Wear out your wheel bearings quicker?

I don't know.

I have never worn out wheel bearings before. However, I would imagine that the added stress of the spacers would add some extra wear.

I guess it depends on what you would consider unacceptable.

I rebuild my front hubs once a year. My front wheel bearings have 300k on them. Look good as new.

If yours wear out 200k after you put on the spacers, is that acceptable to you?

Its still faster than without the spacers, but 200k is a lot of years for most people.

Just guessing on the 200k, may be longer, may be shorter, may not affect the bearing wear at all.

 

They shouldn't affect the alignment.