With the exception of one stupid fitting, the Sniper is installed on the truck, the fuel tank is back in place with a new sending unit and return line, and the hoses are (hopefully) routed in a way that will feed fuel to the engine reliably. This was not without struggle, and required a lot of problem-solving.
First, I was having issues with electrical continuity in the original fuel sender. I could measure resistance at certain points in the swing of the arm but it wasn’t consistent and no amount of adjustment was working reliably. I was afraid the issue might be my $9 Harbor Freight multimeter so I splurged on a fancier $25 model and got the same result. Doing some research, I learned that there are new senders available, but only for the 15 gallon tanks installed on pickups, which are a different size than the 19 gallon tank I have. I did track down a forum post from 2007 which claimed that a sender from a 1957 Thunderbird would fit with minor modifications, and the pictures seemed to show something very similar to what I already had. So I took advantage of a solid return policy and ordered one from AutoZone with free one-day shipping.
On the bench, when I compared it to the original sender, it looked a little different, but putting both of the units on the bench base and comparing the arc of the center arm, and their length showed that they were roughly the same. The new unit has a brass float and tested flawlessly with the multimeter, so I went ahead and put that in the tank. After cleaning the inlets on the tank out, I sealed everything up and got it ready to put back in the truck. This took a bit of maneuvering, but once I had the hoses in place, I jacked it up and got it into position.
At this point, it was clear I would have to modify the tank straps to allow for the extra inch and a half I had to add between the tank and the body of the truck to clear the return inlet. I cut the brackets off with the cut off wheel, and fabricated some new straps out of 16 gauge steel. After welding the brackets onto the strap extensions, I brought them out to the truck and welded the two sections of strap together. When they were cold, I cleaned them up, painted them, and then got them ready to hang the tank.
This had taken a lot more time that I thought it would. I fed the sender wire over the frame rail, hooked it back up to the wiring harness and fed the return line up through the body mount to the engine bay. Working methodically, I reattached all of the hoses to the fill tube, the vent tube and the fuel line itself. I was very careful measuring and cutting the hose that had come with the Sniper kit and it looks like I’ve got just enough to finish the job. The only thing left to solve is finding a 90° fitting for the fuel inlet on the carburetor, which butts up right next to the water neck on the engine. I’d ordered two 90° fittings and had them sent overnight via the jungle site, but the second fitting is just too long to fit in the space available. So I’ve got a call Holley’s tech support line to see if they can suggest a solution.
At this point, everything is complete, minus that fitting. When I’ve got that solved, I can put gas back in the tank, run a bunch of it through the system to flush it, and do all of the preflight checks for the carburetor computer. The other check I wanna do before anything else happens is to pull a couple of the spark plugs and eyeball the cylinders for any sign of water or rust. After draining a bunch of water out of the fuel tank, I’m concerned about it being in the cylinders, and I want to look for any signs of hydrolocking. If there is any water in there, I’ll bump the engine over a bunch of times to clear it out.
In non-engine related news, I did a bunch of work on the rear barn door handle on the bench to fit a door lock correctly in the barrel without having it fall out. What I had to do was take a Dremel and carefully carve a channel out of the back of the lock cylinder to accept a standard lockring. I used the pair of pliers to squeeze it down to be the same diameter as the cylinder, trimmed the outside edges, and then inserted it into the barrel. I was able to get a pair of lockring pliers inside and open it up so that it stayed inside the barrel. I installed it first thing Friday morning and just like that I had a locking rear door for the truck.
I’m sorry, I would have taken pictures but I was hustling pretty much all day Sunday from 10AM to about 7PM to get this done. I was able to get the truck down off the jack stands and under a tarp just as dusk was falling. Monday morning is rainy so I’ll see if I can get back out there on Tuesday to open things back up.