- Thread starter
- #61
I'd really like to stop by and check it out / give a hand if needed. I'm starting the LS planning here.
Sounds good to me! I'll shoot ya a PM.
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I'd really like to stop by and check it out / give a hand if needed. I'm starting the LS planning here.
I used this kit from a mud member for my swap. Very burly.Anyone that's done this swap before - did you route a negative cable from the battery to the body with a separate negative cable from the block to an engine mount bolt? Figured the more grounds the better.
Same on my swapI used this kit from a mud member for my swap. Very burly.
It includes:
Battery negative to fender and motor mount cables
Ground strap from head to firewall
Ground strap from starter to frame
Still not enough grounds.....Oh and a ground strap to the radiator aluminum to the frame
View attachment 3771962
View attachment 3771963
View attachment 3771964
I always try to ground the nut behind the steering wheel tooStill not enough grounds.....
That's what the seat belt is forI always try to ground the nut behind the steering wheel too
With the electrical portion of the swap taken care of it was time to move onto the fuel system. There's a ton of different ways to do this, but in my opinion an in tank pump is the most reliable way to do it.
Since I have an FJ60 that didn't come from the factory with fuel injection, the only way I could’ve used my old tank with an in tank pump was to modify it myself and I opted not to do that. I bought a long range 38 gallon tank from Man-a-Fre that was designed for an FJ62. @tmxmotorsports sells an adapter that allows you to use a Tank’s Inc GPA-2 instead of an FJ62 fuel pump assembly which is really convenient. These LS’s only need 58 PSI of fuel pressure so I’m using a 190 LPH fuel pump which will be more than adequate. When you buy the GPA-2 fuel pump assembly make sure you get the gasket separately, it does not come with one. Part # is 3G-N.
I had to modify the factory sending unit by brazing on an extension rod that comes with the kit. I used a c-clamp to get everything set up and then used a torch and solder to get it done. I wrapped the plastic float in a soaked rag to protect it from getting melted by the torch and that worked really well. Not the best brazing job in the world but it's solid enough for me.
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Here's the adapter that tmxmotorsports sells. Worked like a charm
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The Man-A-Fre tanks are kind of notorious for having brackets that aren't welded correctly or in the wrong place and my tank also had that problem. It was a pretty easy fix though, just had to slot out the holes on one bracket a little bit more and it fit right in so not a huge PITA. It's a little bit annoying but considering it's $500 cheaper than the LRA tank I can live with it. Everything else bolted up just fine and overall I'm happy with it.
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I did a good amount of research on fuel lines and decided to go with a steel hard line down the length of the frame and then Earl’s Vapor Guard fuel hose from the hard line to the tank and the fuel rail. It’s really good stuff and easier to put together than braided line, just cut it with hose cutters and slip the fitting in and clamp it with a fuel injection clamp. If it’s good enough for high horsepower applications I figured it was good enough for my stock 5.3 in an old brick.
Here's the 3/8 hard line bent up to match the factory contours. Ends were flared with a 37 degree flare to work with the AN fittings
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I've been trying to use as many off the shelf parts as possible on this build so I bought the necessary adapters to work with a stock fuel filter out of a 2003 Tahoe. Just need a 3/8 quick disconnect & a -6AN to M16 x 1.5mm adapter. I didn't use any AN fittings on the return lines, just secured 5/16 hose with fuel injection clamps.
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I'm really hoping to be able to hear this thing run for the first time this weekend, I feel like I'm really close to that first startup with open headers!
By the way - now that I have all the tools to bend and flare these lines I would be open to making a few more and offering them as an off the shelf solution if there's enough interest.
Did you plug the tanks inc vent on tye top of there module?With the electrical portion of the swap taken care of it was time to move onto the fuel system. There's a ton of different ways to do this, but in my opinion an in tank pump is the most reliable way to do it.
Since I have an FJ60 that didn't come from the factory with fuel injection, the only way I could’ve used my old tank with an in tank pump was to modify it myself and I opted not to do that. I bought a long range 38 gallon tank from Man-a-Fre that was designed for an FJ62. @tmxmotorsports sells an adapter that allows you to use a Tank’s Inc GPA-2 instead of an FJ62 fuel pump assembly which is really convenient. These LS’s only need 58 PSI of fuel pressure so I’m using a 190 LPH fuel pump which will be more than adequate. When you buy the GPA-2 fuel pump assembly make sure you get the gasket separately, it does not come with one. Part # is 3G-N.
I had to modify the factory sending unit by brazing on an extension rod that comes with the kit. I used a c-clamp to get everything set up and then used a torch and solder to get it done. I wrapped the plastic float in a soaked rag to protect it from getting melted by the torch and that worked really well. Not the best brazing job in the world but it's solid enough for me.
![]()
Here's the adapter that tmxmotorsports sells. Worked like a charm
![]()
The Man-A-Fre tanks are kind of notorious for having brackets that aren't welded correctly or in the wrong place and my tank also had that problem. It was a pretty easy fix though, just had to slot out the holes on one bracket a little bit more and it fit right in so not a huge PITA. It's a little bit annoying but considering it's $500 cheaper than the LRA tank I can live with it. Everything else bolted up just fine and overall I'm happy with it.
![]()
I did a good amount of research on fuel lines and decided to go with a steel hard line down the length of the frame and then Earl’s Vapor Guard fuel hose from the hard line to the tank and the fuel rail. It’s really good stuff and easier to put together than braided line, just cut it with hose cutters and slip the fitting in and clamp it with a fuel injection clamp. If it’s good enough for high horsepower applications I figured it was good enough for my stock 5.3 in an old brick.
Here's the 3/8 hard line bent up to match the factory contours. Ends were flared with a 37 degree flare to work with the AN fittings
![]()
![]()
I've been trying to use as many off the shelf parts as possible on this build so I bought the necessary adapters to work with a stock fuel filter out of a 2003 Tahoe. Just need a 3/8 quick disconnect & a -6AN to M16 x 1.5mm adapter. I didn't use any AN fittings on the return lines, just secured 5/16 hose with fuel injection clamps.
![]()
![]()
![]()
I'm really hoping to be able to hear this thing run for the first time this weekend, I feel like I'm really close to that first startup with open headers!
By the way - now that I have all the tools to bend and flare these lines I would be open to making a few more and offering them as an off the shelf solution if there's enough interest.
Redoing my fuel supply line with an actual hard line and not just AN hose is on my list. That looks great!
Did you plug the tanks inc vent on tye top of there module?
Thanks for giving me a plug I don't advise the adapter everyone that has purchased one has all been word of mouth here on the forum and I am very thankful for that!
I piped that extra vent on the tanks inc in tank pump back into my vent hose that goes up the frame rail into the engine bay to the charcoal canister. It was the fuel tank vent plus the tanks inc vent.Thanks man! It's not perfect, but pretty good for a first timer. Having a good flare tool & bending tool makes all the difference in the world. I used a Ridgid Model 377 for the flares and an Imperial 370FH tube bender.
I left it open, figured another vent wouldn't hurt anything but I can easily slap a cap on it. I have pretty good access to it through the sending unit hole.
Happy to advertise for ya man, it's a really great solution and the Tank's Inc stuff is fantastic.