Hi all. Just got my first Z about a month ago, 1981 280zx n/a AT, wanted a 5spd but just got to good of a deal on this one. Perfect paint, only one rust spot and only 75k original miles for $1500. Well anyway, I want to do the simplest thing either get an overdrive unit added on or, swap to a 5spd. I know they have aftermarket overdrive for chevys and such but not sure on the Z. The 5spd is my present option but would rather get the OD idt that would be cheaper, as I am a full time student. any info would be greatly appreciated.