I have acquired a 1987 f250 that's was one of those conversion trucks that has dual rear wheels the front end has the deep wheel hubs also any way it has a 460 5 speed. the EFI manifold was removed and added a edelbrock manifold and holley carburetor. there's a maze of hoses and vaccum lines running every where im wanting to clean up the thing. Anyone make an intank pump I could use? they have a little wimpy mr Gasket pump rigged to the frame. I am going to rip all the blasted old brittle plastic lines out and start over and i'm thinking about using steel brake lines I know I probably loony form taking this on but I I have plenty of time to mess with it what yall think ?

 

Congratulations on your purchase. You are a brave man taking on something like this. I definitely don't have the knowledge or patience to tackle it. Kudos to you.

Your carb'd system only needs about 10 psi to the carb so I would imagine your frame mounted fuel pump will be sufficient. As far as I know most in tank pumps will put out 30 or more psi. Way too much for a carb system to handle.

If I read correctly you are going to replace your vacuum lines with steel brake lines? At first I thought Nooooooo, (too much overkill you know) but then I started to picture the artistic applications that polished steel brake lines could add to the under hood environment. It could look great. supporting them might be an issue but go for it. Post pictures when you are done. I would like to see it.

 

no sir I was talking about replacing the old briddle plastic fuel lines that run down the frame with brake line holley says I only need 5 to 7 psi for the carb. I will not need much vacuum hose one I get all this stuff cut back

 

Oops my bad.

 

Watch the vacuum lines. Some may be for controls such as the heater. Since this is an EFI to carb conversion, your evap may be laying there plugged or disconnected. You should make sure to either reconnect it or route the venting well away from the engine and passenger compartments. Ignition control would be another place where vacuum signals might be present.

Ripping the stuff out is tempting, but a slow process of tracing them out and keeping the ones you need might make more sense.

Good luck!

BTW, how does it run?

 

yea the heat controls are vacuum gona take a tomato soup can poke a hole drain the contents poke a line in the hole to create a vacuum resiviour might even pull the label and give it a coat of black paint. the more crap I get off the better its running. I was just wondering about whats the best to use for the fuel pump thanks friend!

 

Brake line is a little small. I'd suggest 3/8 line. Running fuel lines is quite critical. Avoid rubber lines. Steel or nylon lines like the factory used are good choices. Are you sure your original lines are brittle?

I'll spare you my speech on the folly of converting EFI vehicles to carburetors. You really had no choice in this anyways. Since you are stuck with a carburetor, I would look hard at that pump plumbed into the system. The original fuel pumps included an in tank lift pump, a dual function reservoir operated by the pressure delivered from the selected fuel tank/pump and a frame rail mounted high pressure pump. If you are retaining dual tanks, you either have to retain the in tank pumps and the dual function reservoir, or replace the reservoir with a tank switch. The original EFI fuel line system also had return lines which can be put to use with a bypass type regulator. The stock in tank lift pumps are capable of more than enough pressure to operate a carbed engine and the frame mounted high pressure pump can be dispensed with. A fuel pressure regulator and a safe means of controlling the electric fuel pumps must be used. No wiring it to the ignition switch without some sort of shutoff that will kill the pumps if the engine is not running!

Have a look here.
https://www.ford-trucks.com/forums/1...llation-2.html

 

yep they be real brittle more than any ive seen before plus the hp pump is gone the dual function reservoir is gone no pump in the tank just a piece of fuel line with one of those brass looking filter in it. it's in ruff shape but I know the truck don't smoke leak or use any oil and yes im planning on 3/8 tubing and I can double flare where needed. I wish I could put a mechanical pump on it and be done it thank you sir

 

 

yep you be right! I went picked up the title off the table and had me a look see. it clearly says 1988 lol that's even better I gots me a year newer truck than I thought I had thanks for all the help