front and rear diff for 91 4rnnr

my front diff is mashed potatoes and im thinking about going w/ lockers in front and rear....any opinions would be very helpful.ARB air lockers seem like a good idea? also do they make heavy duty cv's for my year ?

If you've got the $$ ARBs are the best. I love mine.
AFAIK no one makes hvy dty CV's for IFS like the Longfields, etc for solid axle trucks.

Thank You for info .... ok so arbs are good, i know nothing about my cvs , are newfields what i have?