The cross harp version is the easiest, imo:

http://www.harptabs.com/song.php?ID=16190

And the straight harp isn't bad either:

http://www.harptabs.com/song.php?ID=16189

But here's the slant harp version if you'd rather have a challenge.

-3”-3 -3”   -4  -4 -4   -4  -3”  -3 -3” -4  -4 -4

  I-I could ride around the world in an old oxcart

-3” -4 -4 -4 -4 -4 -3” -3 -3” 4 -3” -3  -3”
And never let another  gi-rl thri-ll my heart

CHORUS:
-3”  -3 -3” -4 -4 -4 -3 -4 -3

Ain't tha-t loving yo-u  baby? (x3)

-4    -4   -4 -3” -3  -4
Ain't that loving you so?

-3”-3 -3”  -4  -4 -4  -4   -3”  -3” -3  -3”  -4  -4 -4
 I-I could meet a hundred girls and have-uh loads of fun

-3” -4 -4  -4  -4 -4 -3”  -3  4  -3” -3  -3”
My huggin' and my kissin' belongs to just one

(REPEAT CHORUS)

-3”-3 -3” -4 -4   -4   -3”   -3 -3” -4 -4 -4
 I-f you gave me nine lives like a  tommy cat
-3” -4   -4  -4  -4 -4  -3” -3 -3” 4 -3” -3  -3”

I'd give 'em all to you and never  ta-ke one back

(REPEAT CHORUS)

-3” -3 -3”  -4-4  -4 -4  -3”  -3 -3” -4 -4   -4 -4   

I'm putting on my Sunday suit and I’m goin' downtown

-3” -3  -3” -4 -4   -4   -4   -3” -3 -3” 4 -3” -3  -3”
But I’ll be kissin' your lips before the su-n goes down

-3”  -3 -3” -4 -4 -4 -3 -4 -3
Ain't tha-t loving yo-u  baby? (x2)
-3”   -3 -3” 5 5   -4’ -3” -3

Ain't tha-t loving you baby?

 -5    5   5 -4   -4  -4
Ain't that loving you so?