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06-24-2008, 08:25 AM
| #1 |
| Senior Member  Join Date: Mar 2008 Location: Lincoln NE
Posts: 439
  |  4.3 or 305 in a 4x4 from the factory??? this may be a dumb question but did GM ever use a 4.3L or a 305L in a full size 4x4 truck application. I know the 4.3 and 305 came in 2WD applications but not sure about using one in a 4x4 Just really wondering if a 305 will hold up to 4x4 demands
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06-24-2008, 09:49 AM
| #2 |
| Senior Member  Join Date: Feb 2008
Posts: 176
| One of the most successful 4x4 engines ever made was the AMC 4.0 L found in Jeeps. I've seen them pull not only themselves but other 4x4's out of trouble. So if a Jeep can pull itself and a full size out of the mud then I think a 4.3 or 5.3 could certainly take care of itself alone. I never saw a dealer order a full size 4x4 with a 4.3 but a customer could order one. I don't know if it is still true but custom ordering a truck was totally different than a car in that the customer could build any combination he wanted leaving off things like a bed, bumpers etc. |
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06-24-2008, 01:51 PM
| #3 |
| Senior Member  Join Date: May 2006 Location: Bay City,Michigan
Posts: 365
| My 94 W/T 1500 4x4 came with a 4.3l but I swapped it for a decently built 350 that i still need to work out the fuel delivery problem. has to be the carb
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06-24-2008, 03:49 PM
| #4 |
| mod-o-tator  Join Date: Feb 2006 Location: michigan
Posts: 4,060
| my 97 has the 305 in it.
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06-24-2008, 03:53 PM
| #5 | |
| Senior Member Join Date: Feb 2008
Posts: 176
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06-24-2008, 05:25 PM
| #6 |
| Senior Member Join Date: May 2006 Location: Bay City,Michigan
Posts: 365
| The fuel pump isn't a high pressure pump. Well for the holley it is but it puts out only 14 psi. (4.3 was TBI not CPI) but when I put a pressure regulator on it and set it for 7 psi it seems like it didnt get enough gas. Idle is inconsistnent and timing jumps around. I'm gonna buy a new carb and dial that in since the holley sat for a few years and dont want to tear it apart. I do have the fuel running from tank pump into the pump on the engine with the return line hooked up and put the regulator close to the carb. I think i'm going to tear the engine apart because the guy who built it wasn't a smart guy. I actually think the cam is off a few degrees
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06-25-2008, 08:24 AM
| #7 |
| Senior Member  Join Date: Jun 2007
Posts: 222
| Log onto Autozone and look up a certian year GM truck and it will tell you what percent was V6 or V8 |
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06-25-2008, 06:50 PM
| #8 |
| Senior Member Join Date: Mar 2007 Location: Buffalo Ny
Posts: 620
| the 305 came in thousands of 1500 and 2500 4x4 trucks..
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06-25-2008, 06:52 PM
| #9 |
| Senior Member Join Date: Nov 2005
Posts: 89
| I have a fullsize longbed 4x4 1987 4.3 liter throttle body fuel injection. I love my truck. (V10) |
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