77 or 77.5 how to tell?
 

Hey guys I was cruising the web today and some of the parts I want are for a 77 or 77.5 how can I tell wich I have? Its a f250 custom 4x4 with a 400

Post vin number and someone will decode for you.

'77 (highboy)
divorced transfer case
three drive shafts
in-cab fuel tank
crossmember under front bumper
5-7 leaves in front spring pack
4" blocks in rear


'77.5 (lowboy)
married transfer case
two drive shafts
no in-cab fuel tank
no crossmember under front bumper
2-3 leaves in front spring pack
3" blocks in rear

Vin and or look at the door striker tag (I know they call it something different) and see the 2 month and 2 year manufacture date to know.

My silver 77.5 was made in 10/77 so its a oct baby with all the lowboy equipment.

Thanks guys helpful as always looks like ive got the 77.5

VIN...
 

I know they say the cutoff was 20,000 for the vin, mine however, is 22,000 with all the highboy items. I even found the vin on the frame to verify cabs were not switched at some point. maybe I have the last true Highboy made.

You're not the first guy....those "hard and fast" numbers that one sees in the parts catalog do not equate to the real world......

I can't venture a guess when the last highboy was, but I can guarantee you it was after Y20,001

.
 

maybe that should be a new thread here. What is the highest VIn for a 77 Highboy. I'll post mine tonight when I get home.

I like that idea, very much.

It causes a lot of confusion when a new guy posts up here with what he claims is a post '77.5 highboy, e.g. serial # Z21,901 and we say no, Y20,001 is the cut-off.

There's been a few guys on here with legitimate highboys, post Y20,001