Carb swap
Fleet Mechanic
Joined: Mar 2014
Posts: 1,926
Likes: 116
From: Saskatchewan Canada
That is wiring for a 90's style in car cellphone. Motorola by the looks of it. The round connector is for the antenna. Likely goes to a window for a glass mount antenna or a bushing through the roof, or on a fender for a conventional mount. The cable with the multi pin connector will go to your fusebox. The telephone style cable is an extension for the handset. All can be removed. I put hundreds of those in back in the day.
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Postmaster
Joined: Mar 2013
Posts: 3,066
Likes: 7
From: Over There
I'm 99% sure this isn't correct. That truck will have up to 3 fuel pumps in total. A low pressure fuel pump in each tank and a high pressure pump on the frame rail. To fuel a carb all that needs to be done is to remove the high pressure fuel pump on the rail and use the in tank pumps to push the fuel to the carb WITHOUT a mechanical pump at all. This is how both my 86 and 87 are set up setup stock.
Fleet Mechanic
Joined: Mar 2014
Posts: 1,926
Likes: 116
From: Saskatchewan Canada
I'm 99% sure this isn't correct. That truck will have up to 3 fuel pumps in total. A low pressure fuel pump in each tank and a high pressure pump on the frame rail. To fuel a carb all that needs to be done is to remove the high pressure fuel pump on the rail and use the in tank pumps to push the fuel to the carb WITHOUT a mechanical pump at all. This is how my 87 is setup.
I think removing the pumps is the best idea. Had a friend try this with a GM product and it starved for fuel trying to suck through the in tank pump. Worked great when he removed the pump. Short piece of hose worked well.
Postmaster
Joined: Mar 2013
Posts: 3,066
Likes: 7
From: Over There
Might have to go with the 1% here, but the three pump setup is pre '92 or even earlier if I'm correct. The OP has a '95 truck which should use the fuel delivery modules with the HP pumps in the tank.
I think removing the pumps is the best idea. Had a friend try this with a GM product and it starved for fuel trying to suck through the in tank pump. Worked great when he removed the pump. Short piece of hose worked well.
I think removing the pumps is the best idea. Had a friend try this with a GM product and it starved for fuel trying to suck through the in tank pump. Worked great when he removed the pump. Short piece of hose worked well.
