Swapping out V6 for V8

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Swapping out V6 for V8

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Swapping out V6 for V8 - 2/25/2006 5:02:07 PM

JDW539

Posts: 1
Joined: 2/25/2006
Status: offline

I have a 98 GMC pick up with a 4.3 V6 and would like to replace it with a 305.
How much trouble will this be?

Post #: 1

RE: Swapping out V6 for V8 - 2/27/2006 4:28:54 PM

brads

Posts: 18
Joined: 1/18/2006
Status: offline

Well, it all depends on how you look at it. On the one hand, they had V8's in 'em so no big deal. Everything you need's at the wrecking yard or on a doner truck. But on the other hand, nothing will be interchangable from V6 to V8 (cooling system; trans; electronics; exhaust; etc.) so that means starting at the grill and working your way back to the tail lights. If you take my meaning. I guess it all depends on how bad you want to do it. And on how much money you want to spend too.

Me

(in reply to JDW539)

Post #: 2

RE: Swapping out V6 for V8 - 8/22/2006 11:04:51 PM

4jeepnuts

Posts: 6
Joined: 8/21/2006
Status: offline

2nd thing If your going to go thru all that. The 305 isn't much more than the 4.3 for power or economy.

For all the trouble go to a 350.

that will make you smile.

(in reply to brads)

Post #: 3

RE: Swapping out V6 for V8 - 6/8/2007 6:32:59 PM

chevyman71

Posts: 1
Joined: 6/8/2007
Status: offline

I have a 94 with a 4.3. Would it be just as hard to put a 350 in my truck even though its an older model and doesnt have all the electrical components as the 98 model?

(in reply to 4jeepnuts)

Post #: 4

RE: Swapping out V6 for V8 - 6/9/2007 4:13:57 AM

Argon

Posts: 2181
Joined: 2/25/2007
Status: offline

Yes..this gets asked a LOT...the only feasible way is to have a wrecked truck or something to take everything..'
fuel pump
ecm
wire harness
exhaust
mounts
rad
shrouds

and thats IF you have a complete engine,with a tbi,intake,brackets,sensors,etc

(in reply to chevyman71)

Post #: 5

RE: Swapping out V6 for V8 - 6/25/2007 5:54:35 AM

stopspazinout

Posts: 917
Joined: 4/23/2007
Status: offline

thats why the 305 to the 350 is an easier change

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89 silverado new 5.7, rebuilt700R4, RCLB Debadged, 16x8 torque 2s in LT265/75/16 BFGS, 2.73s , opened up intake, airade tb spacer, headers with dual high flow cats and 40 series dumped, audiobahn spkers with memphis 10s to a rockford amp.

(in reply to Argon)

Post #: 6

RE: Swapping out V6 for V8 - 7/2/2007 2:07:50 PM

sootjunkie65

Posts: 40
Joined: 6/26/2007
Status: offline

If you want to do a V8 swap go with a 350 because the 305 isnt a much of power increase over a 4.3 but you will need to replace almost everything in the engine compartment and youre gonna need a new exhaust, and drivetrain.

_____________________________

1993 GMC K2500 4x4 6.5 turbodiesel, 4 spd w/granny gear, 4" turbo back exhaust, high flow intake, solid flywheel conversion,265/75/16, diamondplate toolbox,homemade light bar W/KC's
Coming soon- 6" lift, 35's, chip, and methanol injection.

(in reply to stopspazinout)

Post #: 7

RE: Swapping out V6 for V8 - 7/2/2007 7:58:48 PM

72charger

Posts: 1714
Joined: 6/28/2007
Status: offline

It's never worth the trouble to do an engine swap newer vehicles..... Only excuse for that is hotrods/musclecars... and Civics...

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Flowmaster 40 muffler with duals, redneck ram air, K&N air filter/oil filter, Trans Dapt Torque Curve TBS, Optima Red Top, Royal Purple 5-30