Original Bucket seats installation????

[mcbassin]

Originally Posted by 29od1

Koops rear outer driver's side bracket won't fit if you drill the driver side 3/4" over from the front outer most hole. It was off by about 1/2" from where my bucket seat tracks holes needed to be drilled. It needs to be in the 1-1/8" to 1-1/4" over if measuring center to center.

Can someone with buckets in a truck please measure center to center the distance shown in this picture. Or maybe Koop can answer how far he moved his over.

Thank you.

I hope this picture didn't steer you wrong. I used 3/4" because it made my driver seat position match the passenger side. I didn't want a bigger gap between the console on one side or the other.
Please post the information you come up with here. thanks

[29od1]

Originally Posted by mcbassin

I hope this picture didn't steer you wrong. I used 3/4" because it made my driver seat position match the passenger side. I didn't want a bigger gap between the console on one side or the other.
Please post the information you come up with here. thanks

Hi Mike,
You didn't steer me wrong. I measured my seats at the 3/4" position and I agree that it puts them in about the same position LH & RH. I just had to modify the rear outer bracket to fit the holes.

I was just hoping that someone could give some concrete dimensions from a bucket seat truck so that it could be used for future reference by all the guys on here doing this. What you started with this thread and what you did with your install is great info to have!
David

[mcbassin]

Adding to this thread
These pics were in that older thread linked on page 1

[mcbassin]

If anyone that has an original bucket truck can measure the diameter of the screw head with the blue arrows, we can then scale the center to center hole spacing as GM did them.

[mcbassin]

Originally Posted by 29od1

Hi Mike,
You didn't steer me wrong. I measured my seats at the 3/4" position and I agree that it puts them in about the same position LH & RH. I just had to modify the rear outer bracket to fit the holes.

I was just hoping that someone could give some concrete dimensions from a bucket seat truck so that it could be used for future reference by all the guys on here doing this. What you started with this thread and what you did with your install is great info to have!
David

Thanks David,
I think we are all learning from this thread. I really don't understand all of what GM did on these trucks but the more I learn the more I find out I don't know.

[LUCKTRUCK]

how come the member who is selling the outer rear brackets on the parts board is not commenting? Read post #72 about the fit. Just sayin...

[RogerKoop]

I took some pics of my 1972 C30 which has 44,000 miles on it which has factory bucket seats in it. Like this truck and all the trucks that we have seen bucket seats in, none of them used the bolt in the support that runs underneath the floor.

The front bucket mounting just used a square nut welded to the floor. No additional floor support brackets was used except for what was used for the bench seat. I will take some photos of the front mounting and add them later

As for the offset on the drives side front holes I found it to be 1 1/4" to the left. See photo.

[29od1]

Thanks for the response Roger. So it looks like 1-1/4" over is where it really should be. I agree that your bracket would fit with no mods if you drill the drivers side outer front bolt hole at 1-1/4" over from the existing bench seat bolt (that's measured center to center).

I used a short drill bit and put a bolt through the z-shaped cab support. Maybe it's not exactly factory, but since the nut's there I thought I'd use it.

It would be nice to have a second reference point if anyone else with an original bucket seat truck could measure like Roger did above.

[29od1]

Well I think this should finally put the question to rest as to where the drivers side outer front hole should be located. I found an original bucket seat truck with original paint under the seat to measure from. As you can see in the pic, this confirms Roger's measurement of 1-1/4" center to center distance from the original bench seat hole. As a side note, I think it's actually 1-3/16", but if you're within 1/16" of an inch, I would guess you would be inside of the factory specs.

[29od1]

Just to add a bit more, the truck I looked at had the bolt through the fore/aft floor z-shaped section as you can see in pic one.

The other pics are of the front mounting nuts from under the truck. Pic 2 is of the inner front drivers side. Pic 3 is of the inner front passenger side. If you don't have the formed z-section reinforcement that runs from side to side (which only comes installed on factory bucket trucks and Blazers), you'll need to fab something up like mcbassin did in his install.

The last pic is of the original mounting bolts and a vintage koozie that was under the seat.

I hope this helps everyone out and the major parts of this thread would be great to put in the FAQ section. Thanks to mcbassin for starting it and everyone who contributed!

[7dee2]

This is FAQ section material.

This is the best thread on the forum for bucket seat mounting information IMO.

[mcbassin]

Originally Posted by RogerKoop

I took some pics of my 1972 C30 which has 44,000 miles on it which has factory bucket seats in it. Like this truck and all the trucks that we have seen bucket seats in, none of them used the bolt in the support that runs underneath the floor.

The front bucket mounting just used a square nut welded to the floor. No additional floor support brackets was used except for what was used for the bench seat. I will take some photos of the front mounting and add them later

As for the offset on the drives side front holes I found it to be 1 1/4" to the left. See photo.

Originally Posted by 29od1

Just to add a bit more, the truck I looked at had the bolt through the fore/aft floor z-shaped section as you can see in pic one.

The other pics are of the front mounting nuts from under the truck. Pic 2 is of the inner front drivers side. Pic 3 is of the inner front passenger side. If you don't have the formed z-section reinforcement that runs from side to side (which only comes installed on factory bucket trucks and Blazers), you'll need to fab something up like mcbassin did in his install.

The last pic is of the original mounting bolts and a vintage koozie that was under the seat.

I hope this helps everyone out and the major parts of this thread would be great to put in the FAQ section. Thanks to mcbassin for starting it and everyone who contributed!

Thanks guys for taking these measurments. I wish I had them last year when I drilled my cab. However, me being impatient I made my Driver side gap between the console match my passenger side. I don't know GM made it the way they did? But mine is 1/2" closer so if you're wanting to make it like the Original bucket cab then 1-3/16" to 1-1/4" it is. Thanks again

[Mayo]

Great info in here
Posted via Mobile Device

[1969stepside]

anymore info on this topis?

[1969stepside]

so does anyone have the exact dem for the "dimples in the floor"?

[71blksuper4x4]

The screws that hold the jack parts behind the cab pillar I believe are the same as used for blocking off the factory holes. Trevor

[FirstOwner69]

Originally Posted by 71blksuper4x4

The screws that hold the jack parts behind the cab pillar I believe are the same as used for blocking off the factory holes. Trevor

I have heard that Phillips head screws (actually more like 5/16" Phillips head bolts) are what was normally used. However, from day one, my early 69 Fremont built truck had hex head 5/16" bolts like those used to mount the seats.

Also, for what it's worth, the top and bottom sections of 69 consoles (at least early 69 consoles) were fastened together differently than later consoles. The assembly manual clearly shows the difference.