Question about 1984 Chevrolet Chevy

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Head Swap 1984 S10 2.8L V6 carburated motor nfg! 1995 Chevy V6 vortec, fuel injected. Can I swap heads and intake off the '84 to the vortec V6?

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  • Anonymous Mar 17, 2014

    1994 Gmc jimmy 4.3l v6 vortec multiport fuel injected

  • Anonymous Mar 31, 2014

    want to do away with fuel injection

  • Anonymous Mar 31, 2014

    Iwant to get rid of fuel injection and carburate

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The 2.8 is a 60 degree engine, and the 4.3 a 90 degree engine. Meaning the bank of the cylinders in relation to the center line of the engine. If you were asking about a 3.8 and 4.3 I'd say yes you could, as each of these is based on a 305, and 350 respectively. I don't believe the 2.8 and 4.3 have the same cylinder head bolt patterns to allow correct mounting to the block. Additionally you have to be sure about valve opening clearance requirements using the larger cylinder head because of the smaller bore of the 2.8. The 4.3 heads have larger valves, and may not clear the block surrounding the bore. The chamber of the 4.3 heads might extend onto the flat surface of the 2.8 block which is an engineering no-no due to hot spots/dieseling and other problems you would design into this monsterous mating.
I like the way you think though. Chevrolet has been doing this since they introduced the first small block back in the 50's.
You are right about the 2.8 being a dud. I had one, and it couldn't get out of its own way. You might be better finding a good low mileage 4.3, and grab the mounts along with the vehicle you got the engine from. Also be sure you get the computer, and harness. If that vehicle is injected and computer controlled, and yours is not, there would be a whole nother host of issues to deal with that you don't sound like you would wanting to encounter. In that case you might as well drop a small block in, because the issues would be similar.

Posted on May 21, 2009

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Posted on Jan 02, 2017

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