Swaping to a 90 style step side bed ?

[Jay84]

I've seen a few that have looked good but are they the same width? Or to you have to cut them all up?
I can get a rust free one for cheap but a 6 foot square bed costs way more and needs all sorts of body work, mine is beyond repair

 

[Old77]

I don't think there's any cutting required. The only thing you'll need to do is drill new bolt holes in your frame to match the GMT400 bed.

 

[J Knight]

I've never seen a gmt400 bed "look" good on a square.

 

[Swims350]

me either, if it aint a square bed on a square truck or a gmt400 bed on a gmt400 truck it doesn't look good to me. The lines absolutely do not match.

It aint my truck though.

I didn't think drilling the frame would make it work but maybe so, the front mounts on the gmt400 bed are outside the frame on the gmt400 trucks, and all in board on square body truck.

 

[89Suburban]

I don't think there's any cutting required. The only thing you'll need to do is drill new bolt holes in your frame to match the GMT400 bed.

Aren't the frames on the GMT's wider than the squares?

 

[Old77]

I've never seen a gmt400 bed "look" good on a square.

Me either. My uncle has one on his '74. He loves it but I'm pretty indifferent about it and don't like it much because the body lines don't match up at all IMO

 

[J Knight]

No big deal if its needed to work the truck but ugly as far as appearance goes. Imho

 

[Old77]

I didn't think drilling the frame would make it work but maybe so, the front mounts on the gmt400 bed are outside the frame on the gmt400 trucks, and all in board on square body truck.

Aren't the frames on the GMT's wider than the squares?

Possible. I just going from what I've read in the past so my input could possibly be wrong if I got my info from a shady source.

 

[Jay84]

If it was a easy swap I was just gonna throw it on till I found a decent deal on a square bed not TO concerned about looks as it would be temporary and the newer bed was DIRT cheap

 

[Swims350]

honestly I've not done it, nor have I seen it done in person to be able to see how it's done, but I have a fleetside gmt400 outside in my yard and my old man has an 84 fleetside square right across the road so I can look at both and have personally pulled the bed off both trucks.

One big difference in the fleetsides is the square using a carriage bolt, rounded over head, and nut, thru the bed and frame, the gmt fleet anyways, not sure on steppers, but fleets use a bolt that threads up into the bed. metric 18mm head and i think it's 14x1.5 or so, not positive on that one.

Also not sure if that makes any difference or not.

 

[bucket]

I don't like either of the '88-'98 beds on a square, but I'm still very curios how people mount them. Close to work, there's a '73-'74 with a GMT longbed on it, it's ugly as sin. There's also an '88-'98 Chevy with a square ford bed on it.

Although, an '88-'98 fleetside bed looks OK on a '67-'72 because the body lines are fairly close. The wrong wheelwell shape bugs me though. And I'd rather have the stock bed.

 

[Townsend600]

I think they make them look like junk yard trucks personally. I have never been a huge step side bed fan either.

 

[adinpoor1995]

NEVER. Do this.

 

[Driver4r]

Gmt400's are a narrower body than squares. Ive seen a square-body bed on a 70. And a gmt bed on a 71. The gmt looks way better on the 71 than the square. But i personally like square beds on square trucks.

 

[DUALLYBOURBON]

I loved the look when i was younger... But the older I got the more I was just turned off by it. Its your truck tho and if it fits in your budget better, and you like it then buy it!