This is an excellent song, and it's really easy.
Sounds great on acoustic. Here we go...

INTRO:
e-2-0-2-3-2-0-2-|---------------|
b-3-3-3-3-3-3-2-|-2-0-2-3-2-0-2-|
g---------------|-2-2-2-2-2-2-2-|
d---------------|---------------|
a---------------|---------------|
E---------------|---------------|

The intro chord progression basically goes like this:
D Dsus2 D Dsus4 D Dsus2 D
A Asus2 A Asus4 A Asus2 A

VERSE 1(use intro over verse)
D
I got my first real six-string
A
Bought it at the five-and-dime
D
Played it til my fingers bled
A
It was the summer of '69

(Same for verse 2)
Me and some guys from school
Had a band and we tried real hard
Jimmy quit and Jody got married
I shoulda known we'd never get far

CHORUS
Bm        A
Oh when I look back now
D                G
That summer seemed to last forever
Bm       A
And if I had the choice
D               G
Ya - I'd always wanna be there
Bm             A                     (Back to intro progression)
Those were the best days of my life

VERSE 3(use intro progression)
Ain't no use in complainin'
When you got a job to do
Spent my evenin's down at the drive-in
And that's when I met you

CHORUS (use same chords)
Standin' on your Mama's porch
You told me that you'd wait forever
Oh and when you held my hand
I knew that it was now or never
Those were the best days of my life

(Intro progression)
Back in the summer of '69

BRIDGE
F            Bb
 Man we were killin' time
        C
We were young and restless
Bb
We needed to unwind
F          Bb               C
  I guess nothin' can last forever - forever, no

VERSE 4 (Back to intro progression)
And now the times are changin'
Look at everything that's come and gone
Sometimes when I play that old six-string
I think about ya wonder what went wrong

CHORUS (use same chords)
Standin' on your Mama's porch
You told me it would last forever
Oh the way you held my hand
I knew that it was now or never
Those were the best days of my life

INTRO PROGRESSION
Back in the summer of '69
CONTINUE ON INTRO PROGRESSION

Happy playing!