rwolf10
Junior Member
- Joined
- Jun 23, 2022
- Posts
- 3
- Reaction score
- 8
- Location
- kansas
- First Name
- Richard
- Truck Year
- 1987
- Truck Model
- k10
- Engine Size
- 5.7
I spent a ton of time time trying to figure out how to get the combination of fuel fillers and hoses together to make it work on my 87 step side, and after much trial and error I found the combination that works best. I’ve tried doing lots of research on what would work best and did not come across much, so I figured I’d make this post to hopefully help someone out in the future.
For the filler neck, they no longer make the ones for the stepside bed. I used part number FN724, which I picked up at autozone but could also get on Amazon. This is a 2 inch ID filler neck, which will have to be adapted down, which I will explain now.
I used two fittings from ICT Billet. The first, AN627-32-28A, is a 2 inch to 1.75 inch aluminum barbed adaptor. The second, is AN627-32A, and this is a 2 inch to 2 inch aluminum barbed adaptor.
Now for the fuel hoses: per side, you will need a quantity of two 90 degree 2 inch filler hoses, and one 45 degree 1.75 inch hose. I got universal ones off of amazon and you’ll need to trim them how you see in the pictures. The vent hoses are pretty simple, they are able to bend enough using universal hoses to not be an issue.
Now came the wildcard. The original GM driver fender that I have has a sheet metal box that you are supposed to attach the filler neck to. I want to run dual tanks, so I bought an aftermarket passenger fender, which is just open and doesn't have anywhere to attach a fuel neck. Rather than fabricating a sheet metal box for the neck to mount to, I had a drivers side plastic fuel filler neck housing from a different driver side fender (I don't know why some had a solid mounted metal housing and some just had plastic). I 3d scanned that housing, mirrored it in CAD software, and 3D printed it using Polycarbonate plastic. I may at some point refine the file a little more and print it out of ABS if it becomes an issue, but it works great so far.
After assembly and tightening everything down, it worked great.
For the filler neck, they no longer make the ones for the stepside bed. I used part number FN724, which I picked up at autozone but could also get on Amazon. This is a 2 inch ID filler neck, which will have to be adapted down, which I will explain now.
I used two fittings from ICT Billet. The first, AN627-32-28A, is a 2 inch to 1.75 inch aluminum barbed adaptor. The second, is AN627-32A, and this is a 2 inch to 2 inch aluminum barbed adaptor.
Now for the fuel hoses: per side, you will need a quantity of two 90 degree 2 inch filler hoses, and one 45 degree 1.75 inch hose. I got universal ones off of amazon and you’ll need to trim them how you see in the pictures. The vent hoses are pretty simple, they are able to bend enough using universal hoses to not be an issue.
Now came the wildcard. The original GM driver fender that I have has a sheet metal box that you are supposed to attach the filler neck to. I want to run dual tanks, so I bought an aftermarket passenger fender, which is just open and doesn't have anywhere to attach a fuel neck. Rather than fabricating a sheet metal box for the neck to mount to, I had a drivers side plastic fuel filler neck housing from a different driver side fender (I don't know why some had a solid mounted metal housing and some just had plastic). I 3d scanned that housing, mirrored it in CAD software, and 3D printed it using Polycarbonate plastic. I may at some point refine the file a little more and print it out of ABS if it becomes an issue, but it works great so far.
After assembly and tightening everything down, it worked great.
