The Stovebolt Site Forums The Parking Lot Big Bolts COE Seat Pedestal / Riser

Anybody ever had, or able to get, decent dimensions for the seat riser of the 47-54 COE trucks? It was cut out of my cab and I'd like to replace it, yet need approximate dimensions. Below is a pic of mine, and one of the stock riser. Any help would be greatly appreciated! Thx, Derek

That's going to be hard to find, unless you find someone Street Rodding one, and not needing all that. No one is parting out COE's nowadays.You may try some of the Face Book COE group pages. most of the COE owners on those pages, are Rodding them. Killer COE's and 1 tons, is the most popular group.

I can measure mine it is a 48 GMC COE, do you need a seat? I have a split bench seat for the shifter between the seat bottoms.

Will check out Facebook, Spanky - thank you! Apache - I don't need a seat, but if you could get me approximate dimensions for all of the critical points from the attached drawing, I'd owe you big time! Don't feel like I need anything fancy - if it's easiest to print it off, write on the dimensions, and scan / snapshot / email, that'll work...just let me know where to send the case of beer (or at least some $'s for your time). Thank you again, Derek.

I'd post a wanted ad with Vintage Chevrolet Club of America, worth the fee just for parts! Best of luck

I will be glad to measure things, and scan it for you. This will happen tomorrow unless someone beats me to it. This appears to be a Chevy, as opposed to a GMC, as it has the shifter bolted to the doghouse. Because the GMC is designed different with a split seat and shifter between the seats, I doubt the seat riser is the same as a Chevy. The seat itself will be the same as any Advance Design but the seat base, as well as the riser are different. In your picture the base has a rearward central indentation along the front edge, to allow the shifter to pass to the rear. If you can weld and fabricate you could take a normal seat base and modify the front edge and shorten the central brace.
Kent

Let's try this. You should know that I removed the seat but did not remove the seat base. This made some of the measurements difficult and I had to take inside measurements some times and outside measurements other times. The metal of the riser is 18 gauge. All numbers are in inches. I don't really know how to measure curves to I approximated the straight portions. Specifically, the front edge of the top view; the 9" is the straight part, the 18" is also the straight part. The curve is not critical so it doesn't really matter. Also I forgot to include measurements of the small curved area seen on the side view. So, the curve is within 2 1/4 inch of the back and the curve is 4 inches wide.

I probably have confused you beyond belief but feel free to respond here or private message me and I will try to help.

Kent

Another thought, you should check this but my guess is that the basic size of the COE riser is identical to the standard cab. You might find a trashed cab and cut the spot welds to remove it and then modify it to use in your COE. I did this on my '37 project because a previous owner switched to a rear gas tank, removed the seat riser and had a carpenter make a seat base. Well, I found a trashed cab, cut the spot welds, some 35-40 of them and welded them to my cab. Worked perfectly. This would be more challenging but not really that hard since the tolerances of the modification are not all that tight.

Kent

Thx Lightholder - awesome sir! What kind of beer do you drink, or can I send you a few bucks to go buy some?

I've added the dimensions to the drawing, and some dimension indicators to show the surface references. I've left some in red as I either wasn't sure I was interpreting your description correctly or the dimensions didn't seem to add up. I'm not real concerned with the curves up front (as I can just follow the doghouse)...as long as I have the height down to the 2-1/2" in the middle, I should be good for clearance with the gearshift linkage.

You're the man, I really appreciate the help : ) Derek

The red circles in the top view represent holes for the seat base. I cannot measure diameter or spacing because my seat base is still bolted to the riser. You can determine that from the seat base you will install. The back wall of the riser also has two horizontal holes on each side to mount the seat base, also not possible to measure without further disassembly.

The 3-1/4 measurement seen in the top view is the inside distance from the front of the riser to the parallel brace that goes the full width of the riser and merges with the curve at the front. The brace is even with the dip in the front of the riser, as seen in your photo. From the side view the 2-7/16 measurement is the height of that brace (it is off the floor and bottom of the riser). That 2-7/16 is not the height of the outside of the riser. It appears to me this brace, while important, is not critical in it's dimensions, as long as it does not extend beyond the outside of the riser or interfere with the shifter.

The rest of your drawing seems correct. No $ or beer necessary, just help another member sometime.

Kent

Thx a ton Kent, really appreciate it sir! This is what I have for now, will markup further as fab work gets done (for the next lost soul!)

Derek