4.3/700r4 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Ron · 07-02-2003, 12:04 PM

I have a carbed 1985 4.3/4L60 out of an Astro van. It has 35,000 miles on it. I have done GM 350 into Scout II's before. This time I want to do a 4.3 into a Scout 800. I'm thinking about using this engine and deleting the computer. To do it this way I need a new intake manifold, carb and a non-computer dist. What part#'s do I need? Is this a vortec eng? Is the 85 a good version to build? Am I screwing up by deleting the computer? Should I go fuel injection instead? I do have the computer with about 20 miles of wire with it. Your ideas would be appreciated. Thanks. BTW, if there is a better place to post 4.3 questions let me know.

gldevall · 07-02-2003, 12:24 PM

I would ditch the computer and put on an Edelbrock performerwith about a 500cfm carb. I'm not sure if it is a Vortec or exactly how to determine that on the V6.

*1FaastC10* · 07-02-2003, 05:11 PM

the 4.3 V6 is a very good engine, with its 4.00" bore and 3.48" stroke, it is essentially a 350 minus 2 cylinders. the engine you have, if it is in fact 4.3, should work just fine without the computer. i'd install an Edelbrock Performer intake, and a 1404 carb if it were mine. the HEI distributor is the same size as a V8 unit, but only has 6 contacts, no you cannot put a V6 cap on a V8 dist. and to answer your question about the ngine being a Vortec or not, no it is not. Vortec 4.3s didnt debut until 92.

gldevall · 07-02-2003, 10:15 PM

Quote:

Originally posted by 1FaastC10
Vortec 4.3s didnt debut until 92.

The one in my 86 was a vortec.

ElGracho · 07-02-2003, 11:11 PM

Quote:

Originally posted by 1FaastC10
Vortec 4.3s didnt debut until 92.

Ugghhh, nope. They were first available in 1985. From the Chevrolet Full Size Pickups brochure:

**old Rusty C10** · 07-02-2003, 11:25 PM

i pulled out a monte carlo motor with a computer (4.3) and put it into the 86 C10 non computer truck and it went right in using the old intake, carb and distributor. the fuel pump even goes right in there just make sure ya get the rod and stick it int he hole anf the plate and pump sounds like an esay enough swap

Ron · 07-03-2003, 12:16 AM

Well, I have the center bolt valve covers so I think it is a vortec. Looks like I'll go with Edelbrock intake and a 500 CFM carb. What about a distributor?

*1FaastC10* · 07-03-2003, 06:53 AM

hmmm... well, the CPI Vortec 4.3 didnt come out til '92

**swervin ervin** · 07-03-2003, 03:59 PM

Nice comeback Jeremy.

I hate to be wrong too. It sort of makes you look like a turd, don't it?

**crossy** · 07-03-2003, 08:17 PM

all of the 4.3's were originally called vortecs then it became a 'buzz' word in 92 with the high perf. version of the engine and it cast into the runner on top the engine. the hi-po version is also referred to as the CFI or MPI engine. as opposed to TBI . they only carbed them for 2 years. I made my own NON computer HEI for it and put a NON feedback style QJ . DAVE

07-02-2003, 12:04 PM	#1
Ron Registered User Join Date: Feb 2000 Location: Zillah Wa. USA Posts: 394	4.3/700r4 I have a carbed 1985 4.3/4L60 out of an Astro van. It has 35,000 miles on it. I have done GM 350 into Scout II's before. This time I want to do a 4.3 into a Scout 800. I'm thinking about using this engine and deleting the computer. To do it this way I need a new intake manifold, carb and a non-computer dist. What part#'s do I need? Is this a vortec eng? Is the 85 a good version to build? Am I screwing up by deleting the computer? Should I go fuel injection instead? I do have the computer with about 20 miles of wire with it. Your ideas would be appreciated. Thanks. BTW, if there is a better place to post 4.3 questions let me know. __________________ '69 SWB '76 International "Terra" "Hooked on holiday beer"

07-02-2003, 12:24 PM	#2
gldevall Registered User Join Date: Mar 2003 Location: Walker, LA Posts: 2,925	I would ditch the computer and put on an Edelbrock performerwith about a 500cfm carb. I'm not sure if it is a Vortec or exactly how to determine that on the V6. __________________ Gary -1986 SWB: lowered 4/6, SOLD!!! -Best 1/4 mile: 14.51 @ 91.01 MPH -2001 Pewter Tahoe, billet grill, Corsa Sport Cat-back, K&N FIPK SOLD!!! -2004 Z-71 Extended cab with a flowmaster, BDS 6.5", 3" BL, 35x12.5x18 Trail Grapplers on Pro-Comp 18x9 wheels

07-02-2003, 11:25 PM	#6
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,277	i pulled out a monte carlo motor with a computer (4.3) and put it into the 86 C10 non computer truck and it went right in using the old intake, carb and distributor. the fuel pump even goes right in there just make sure ya get the rod and stick it int he hole anf the plate and pump sounds like an esay enough swap __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

07-03-2003, 12:16 AM	#7
Ron Registered User Join Date: Feb 2000 Location: Zillah Wa. USA Posts: 394	Well, I have the center bolt valve covers so I think it is a vortec. Looks like I'll go with Edelbrock intake and a 500 CFM carb. What about a distributor? __________________ '69 SWB '76 International "Terra" "Hooked on holiday beer"

07-03-2003, 03:59 PM	#9
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	Nice comeback Jeremy. I hate to be wrong too. It sort of makes you look like a turd, don't it? __________________ Mike 1985 Chevy C-10

07-02-2003, 05:11 PM	#3
1FaastC10 Account Suspended Join Date: Oct 2002 Location: Elkhart, IN Posts: 6,400	the 4.3 V6 is a very good engine, with its 4.00" bore and 3.48" stroke, it is essentially a 350 minus 2 cylinders. the engine you have, if it is in fact 4.3, should work just fine without the computer. i'd install an Edelbrock Performer intake, and a 1404 carb if it were mine. the HEI distributor is the same size as a V8 unit, but only has 6 contacts, no you cannot put a V6 cap on a V8 dist. and to answer your question about the ngine being a Vortec or not, no it is not. Vortec 4.3s didnt debut until 92.

07-03-2003, 06:53 AM	#8
1FaastC10 Account Suspended Join Date: Oct 2002 Location: Elkhart, IN Posts: 6,400	hmmm... well, the CPI Vortec 4.3 didnt come out til '92

07-03-2003, 08:17 PM	#10
crossy Oh,you can't buy that new Join Date: Apr 2000 Location: Pennsville,N.J. 08070, USA Posts: 2,039	all of the 4.3's were originally called vortecs then it became a 'buzz' word in 92 with the high perf. version of the engine and it cast into the runner on top the engine. the hi-po version is also referred to as the CFI or MPI engine. as opposed to TBI . they only carbed them for 2 years. I made my own NON computer HEI for it and put a NON feedback style QJ . DAVE __________________ "been there, done that, ruined the T-shirt". 2007 LBZ GMC Sierra, ECSB 2006 LM7 RCSB Silverado 98 Vortec project. 94,3500,6.5L 4L80 81 SWB GMC POS finally gone 73 Pinto, stock, w/CragarSS's-eww LOTS of Cummins trucks.



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