LS swap dual tank harness kits! - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bh86 · 03-16-2018, 05:52 AM

This is awesome!

TonyC77 · 04-27-2018, 11:00 AM

Quote:

Originally Posted by gmachinz

If anybody is interested, I literally just finished a 3-gang relay kit that replaces ALL of your existing dual tank wiring so that you can run (for example) 2 1987 TBI sending units and run 2 Walbro 255 fuel pumps. I'll be listing these shortly in the FS section with pics! Prices are $319.99 for these harnesses and include a NEW 65 psi GM style selector valve!

How can I purchase this kit?

*gmachinz* · 04-27-2018, 11:49 AM

PM sent!

*gmachinz* · 04-27-2018, 04:42 PM

I sent you my info-let me know if you have any questions.

85Misac10 · 04-27-2018, 05:14 PM

Quote:

Originally Posted by TonyC77

How can I purchase this kit?

You will be happy with this harness, i recently purchased one and wow the quality of it is better that oem.

**hatzie** · 04-27-2018, 05:19 PM

Quote:

Originally Posted by gmachinz

It uses a factory style switch but must be on/off not momentary. As long as it does not say depress fully you're good. I thought I listed the AC Delco/GM part number for it....if not I can look it up-it's still in dealers for about $8-9.

Ask the counter goon for a 1987 GMC K20 "TBI" fuel tank switch.

The AC Delco part number is in post #2 the Dual Tank Theory of Operation thread. Here--->http://67-72chevytrucks.com/vboard/s....php?p=8152326

85Misac10 · 04-27-2018, 06:18 PM

Quote:

Originally Posted by TonyC77

How can I purchase this kit?

You will be happy with this harness, i recently purchased one and wow the quality of it is better that oem.

*gmachinz* · 04-27-2018, 06:55 PM

Quote:

Originally Posted by 85Misac10

You will be happy with this harness, i recently purchased one and wow the quality of it is better that oem.

Thank you for your order and honest evaluation! I simply build them exactly as I would use them myself.

lts70 · 05-04-2018, 12:29 AM

Installing a FITECH TBI in my friends 1973 SWB 4X4 454. We have installed saddle tanks and sending units from a 1987. We also have selector valve and switch to fit the same 87. And Delhi pumps form a mid 90s truck. Will your wiring harness work well with this set up?

TonyC77 · 05-15-2018, 11:04 PM

need info on my harness??

CHEVY072481 · 08-12-2018, 08:11 PM

How much for the wiring harness kit without the fuel tank selector valve?

*gmachinz* · 08-12-2018, 09:25 PM

PM sent!

TonyC77 · 08-14-2018, 12:35 PM

Quote:

Originally Posted by gmachinz

PM sent!

My buddy ordered a ls dual tank kit but received a factory dual tank kit, he already sent you the kit back and he is waiting on his ls swap dual tank kit. He received the kit in pic #1 , he need pic#2
Posted via Mobile Device

jtownes84 · 08-22-2018, 01:05 PM

Quote:

Originally Posted by gmachinz

If anybody is interested, I literally just finished a 3-gang relay kit that replaces ALL of your existing dual tank wiring so that you can run (for example) 2 1987 TBI sending units and run 2 Walbro 255 fuel pumps. I'll be listing these shortly in the FS section with pics! Prices are $319.99 for these harnesses and include a NEW 65 psi GM style selector valve!

check pm please.

70inbville · 05-16-2019, 04:17 PM

do you make this harness that will connect to stock gm in tank pumps rather than the walbro pumps?

*gmachinz* · 05-16-2019, 04:57 PM

I have them also for stock 1981-86 dual tank carbed trucks as well.

70inbville · 05-16-2019, 07:11 PM

Quote:

Originally Posted by gmachinz

I have them also for stock 1981-86 dual tank carbed trucks as well.

Posted via Mobile Device

70inbville · 05-16-2019, 07:22 PM

I am literally building a Frankenstein truck 74 k20 chassis with an 83 body and a 90 tbi top on an 84 short block the truck is a single tank but the bed is dual tank so I’m adding a second tank as not to add to body and paint. Your harness is just the ticket for what I am doing. I’m looking at the Howell wiring harness and hoping that your Hermès will interface with his? Can you give further guidance on that topic or what I need to do. Thanks for the response
Posted via Mobile Device

*gmachinz* · 05-16-2019, 08:06 PM

This is 100% stand alone requiring only a fuel pump output trigger from the PCM or, you can simply use a switched 12V IGN source.

FunKing85 · 07-02-2019, 11:05 AM

Interested in a harness, will be usuing 87 tanks, pollack tank selector valve and 87 switch, AC Delco fuel pumps, In-tank senders. Wopuld love some info! thanks.

STOCKISH · 04-14-2020, 03:28 PM

Still selling these?

superpug · 03-10-2021, 10:22 PM

Big reach, here. Are you still selling these? I dropped my truck off to a shop that got recommended to me for LS swaps while I was deployed. Turns out they dont know how to wire. So I have one operable fuel tank. Its already got dual Walbros in there. After that I have no idea what they did...So I'm just going to try my hand at it.

Also...I uhh have been lurking here a looooong time.

Bloodhound · 03-10-2021, 10:25 PM

Quote:

Originally Posted by superpug

Big reach, here. Are you still selling these? I dropped my truck off to a shop that got recommended to me for LS swaps while I was deployed. Turns out they dont know how to wire. So I have one operable fuel tank. Its already got dual Walbros in there. After that I have no idea what they did...So I'm just going to try my hand at it.

Also...I uhh have been lurking here a looooong time.

His account is suspended here.

superpug · 03-11-2021, 09:15 AM

Well that's not great. Thanks for the info, though!

**ShortHaul** · 03-19-2021, 09:32 AM

Quote:

Originally Posted by superpug

Well that's not great. Thanks for the info, though!

Hi there. I’ve been on the same hunt recently... found that the gmachinz guy is still selling harnesses, look up user Jabin Wood on Facebook marketplace. Also received this link from another user on here, to a company that produces a similar setup. Haven’t called them yet but I like their options. Be sure to post if you end up solving your issue!

https://www.efisystempro.com/dual-tank-fuel-pump-kit

03-16-2018, 05:52 AM	#26
bh86 Registered User Join Date: Mar 2010 Location: ID Posts: 262	Re: LS swap dual tank harness kits! This is awesome!

04-27-2018, 11:49 AM	#28
gmachinz Account Suspended Join Date: Jun 2011 Location: Des Moines, IA. Posts: 4,143	Re: LS swap dual tank harness kits! PM sent!

04-27-2018, 04:42 PM	#29
gmachinz Account Suspended Join Date: Jun 2011 Location: Des Moines, IA. Posts: 4,143	Re: LS swap dual tank harness kits! I sent you my info-let me know if you have any questions.

05-04-2018, 12:29 AM	#34
lts70 1970 Daily Driver Join Date: Jun 2007 Location: Glenns Ferry IDAHO Posts: 1,035	Re: LS swap dual tank harness kits! Installing a FITECH TBI in my friends 1973 SWB 4X4 454. We have installed saddle tanks and sending units from a 1987. We also have selector valve and switch to fit the same 87. And Delhi pumps form a mid 90s truck. Will your wiring harness work well with this set up? __________________ It's not truly yours if you didn't build it yourself or if you don't do your own maintenance.

05-15-2018, 11:04 PM	#35
TonyC77 Registered User Join Date: Apr 2018 Location: Greenville ms Posts: 3	Re: LS swap dual tank harness kits! need info on my harness??

08-12-2018, 08:11 PM	#36
CHEVY072481 Registered User Join Date: Oct 2011 Location: paris, texas Posts: 4	Re: LS swap dual tank harness kits! How much for the wiring harness kit without the fuel tank selector valve?

08-12-2018, 09:25 PM	#37
gmachinz Account Suspended Join Date: Jun 2011 Location: Des Moines, IA. Posts: 4,143	Re: LS swap dual tank harness kits! PM sent!

05-16-2019, 04:17 PM	#40
70inbville Registered User Join Date: Oct 2011 Location: bartlesville ok Posts: 143	Re: LS swap dual tank harness kits! do you make this harness that will connect to stock gm in tank pumps rather than the walbro pumps?

05-16-2019, 04:57 PM	#41
gmachinz Account Suspended Join Date: Jun 2011 Location: Des Moines, IA. Posts: 4,143	Re: LS swap dual tank harness kits! I have them also for stock 1981-86 dual tank carbed trucks as well.

05-16-2019, 07:22 PM	#43
70inbville Registered User Join Date: Oct 2011 Location: bartlesville ok Posts: 143	Re: LS swap dual tank harness kits! I am literally building a Frankenstein truck 74 k20 chassis with an 83 body and a 90 tbi top on an 84 short block the truck is a single tank but the bed is dual tank so I’m adding a second tank as not to add to body and paint. Your harness is just the ticket for what I am doing. I’m looking at the Howell wiring harness and hoping that your Hermès will interface with his? Can you give further guidance on that topic or what I need to do. Thanks for the response Posted via Mobile Device

05-16-2019, 08:06 PM	#44
gmachinz Account Suspended Join Date: Jun 2011 Location: Des Moines, IA. Posts: 4,143	Re: LS swap dual tank harness kits! This is 100% stand alone requiring only a fuel pump output trigger from the PCM or, you can simply use a switched 12V IGN source.

07-02-2019, 11:05 AM	#45
FunKing85 Registered User Join Date: Mar 2014 Location: Merritt Island, FL Posts: 75	Re: LS swap dual tank harness kits! Interested in a harness, will be usuing 87 tanks, pollack tank selector valve and 87 switch, AC Delco fuel pumps, In-tank senders. Wopuld love some info! thanks. __________________ Jake, Merritt Island, FL "If You're Gonna Be Dumb, You Gotta Be Tough"

04-14-2020, 03:28 PM	#46
STOCKISH Formerly- 1972SuperCheyenne Join Date: Oct 2008 Location: Wake Forest NC Posts: 5,782	Re: LS swap dual tank harness kits! Still selling these? __________________ --Josh My Build Thread:http://67-72chevytrucks.com/vboard/s...d.php?t=799218 A good crossthread is better than Loctite any day. Life is not about what you have, but who you have to share it with.

03-10-2021, 10:22 PM	#47
superpug Registered User Join Date: Feb 2007 Location: D-Town, Tx Posts: 2	Re: LS swap dual tank harness kits! Big reach, here. Are you still selling these? I dropped my truck off to a shop that got recommended to me for LS swaps while I was deployed. Turns out they dont know how to wire. So I have one operable fuel tank. Its already got dual Walbros in there. After that I have no idea what they did...So I'm just going to try my hand at it. Also...I uhh have been lurking here a looooong time.

03-11-2021, 09:15 AM	#49
superpug Registered User Join Date: Feb 2007 Location: D-Town, Tx Posts: 2	Re: LS swap dual tank harness kits! Well that's not great. Thanks for the info, though!



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