Using an '87 fuel injection on '85 carb - The 1947 - Present Chevrolet & GMC Truck Message Board Network

greg0380 · 04-15-2004, 08:47 AM

Is it do-able to swap an 87 Fuel injection system from a 350 to an 85 carbureted 305? I know i will need the intake,and maybe exhaust manifolds. Anythiung else? Will the intake bolt to the heads on the 305? Are there changes I need to make to run it on the 305? Will I need the distributor from the FI unit? Anybody have or know where I could get a wiring schematic for a system like this? thanks.

LOHRTBT · 04-15-2004, 11:16 AM

If I were you I would stay away from the factory Fuel inj. on the 87's ... Just ask Low87 what he thinks of it !! hahaa

BaggedC10 · 04-15-2004, 11:28 AM

I've never had any problems w/ my TBI setup. I had a 1986 C10 and would never go back to a carburetor after owning my 87'.

greg0380 · 04-15-2004, 12:50 PM

conflicting reviews! anyone else?

KShortell · 04-15-2004, 12:54 PM

I'm not sure the intake will bolt up. 1986 and older engines had different heads.

I'd investigate a little further before taking the plunge...

onetoncrewcab · 04-15-2004, 11:48 PM

I used 89 heads, intake and injection system on a 1982 short block.

I was happy with the system.

I know the 82 heads would not work with the 89 intake.

All of this went into a 1989 Suburban, so I did not have to mess with wiring.
MJ

Jonboy · 04-16-2004, 09:44 AM

the intake will work if you elongate the 4 center holes of the intake.

flip66 · 04-16-2004, 06:34 PM

The heads may be diffrent I can not remember if the 85 had the bolts that went in at an angle or not. If you have the bolts go inat an angle and you are talking about the TBI sytem everything will just bolt on. you will need the computor wire harnes and sensors. You will need an electric fuel pump. If you are talking about a EFI I do not know never don it.

*1972C10* · 04-16-2004, 11:58 PM

It will work fine Friend of mine put a 87 harness in a 75 Blazer Its awesome Good fuel mileage starts right up ..

I have been considering Putting a Fuel Injection In my 85 I can buy a 89 work truck For 300 dollars running with a 305

My only dilema is i just built and installed a new carbed 350 I think it would be wise to have a cam that Is made for fuel injection but other than that It should work out.

04-15-2004, 08:47 AM	#1
greg0380 Registered User Join Date: Dec 2003 Location: CT Posts: 454	Using an '87 fuel injection on '85 carb Is it do-able to swap an 87 Fuel injection system from a 350 to an 85 carbureted 305? I know i will need the intake,and maybe exhaust manifolds. Anythiung else? Will the intake bolt to the heads on the 305? Are there changes I need to make to run it on the 305? Will I need the distributor from the FI unit? Anybody have or know where I could get a wiring schematic for a system like this? thanks.

04-15-2004, 11:16 AM	#2
LOHRTBT BeWarE tHe eViL CrAnkTOe! Join Date: Oct 2002 Location: Yukon, OK Posts: 3,605	If I were you I would stay away from the factory Fuel inj. on the 87's ... Just ask Low87 what he thinks of it !! hahaa __________________ ~Dave~ You can call me Mike, Mike Oxlong - 1986 Chevy SWB - Stock for now - *1986 Chevy Custom SWB* *Stolen 6/26/05* - 1985 Chevy SWB SOLD - 1999 T/A Some mods www.cardomain.com/id/ramairdave AIM Screenname - Jester84

04-15-2004, 11:28 AM	#3
BaggedC10 Under construction! Join Date: Aug 2002 Location: NorCal Posts: 1,065	I've never had any problems w/ my TBI setup. I had a 1986 C10 and would never go back to a carburetor after owning my 87'. __________________ 2001 Silverado bagged on 22's. Sold

04-15-2004, 12:54 PM	#5
KShortell Registered User Join Date: Oct 2003 Location: Chesapeake, VA Posts: 726	I'm not sure the intake will bolt up. 1986 and older engines had different heads. I'd investigate a little further before taking the plunge... __________________ Semper Paratus

04-15-2004, 11:48 PM	#6
onetoncrewcab One of my kids. Cute eh? Join Date: Oct 2001 Location: Mitchell, SD Posts: 1,286	I used 89 heads, intake and injection system on a 1982 short block. I was happy with the system. I know the 82 heads would not work with the 89 intake. All of this went into a 1989 Suburban, so I did not have to mess with wiring. MJ __________________ If a kid asks where rain comes from, I think a cute thing to tell him is “God is crying.” And if he asks why God is crying, another cute thing to tell him is “Probably because of something you did. John 3:16 2006 Chevy HHR 2000 Dodge Durango 1985 Jeep CJ-7 1970 Chevy Pickup

04-15-2004, 12:50 PM	#4
greg0380 Registered User Join Date: Dec 2003 Location: CT Posts: 454	conflicting reviews! anyone else?

04-16-2004, 09:44 AM	#7
Jonboy Slots go on anything! Join Date: May 2003 Location: Richardson, TX Posts: 5,957	the intake will work if you elongate the 4 center holes of the intake. __________________ 1974 Jimmy- 5.3/4L80e/NP241

04-16-2004, 06:34 PM	#8
flip66 Registered User Join Date: Jan 2004 Location: Garland TX Dallas area Posts: 658	The heads may be diffrent I can not remember if the 85 had the bolts that went in at an angle or not. If you have the bolts go inat an angle and you are talking about the TBI sytem everything will just bolt on. you will need the computor wire harnes and sensors. You will need an electric fuel pump. If you are talking about a EFI I do not know never don it.

04-16-2004, 11:58 PM	#9
1972C10 Account Suspended Join Date: Dec 2003 Location: Texas Posts: 2,686	It will work fine Friend of mine put a 87 harness in a 75 Blazer Its awesome Good fuel mileage starts right up .. I have been considering Putting a Fuel Injection In my 85 I can buy a 89 work truck For 300 dollars running with a 305 My only dilema is i just built and installed a new carbed 350 I think it would be wise to have a cam that Is made for fuel injection but other than that It should work out.



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