4.3 Vortec Cheap Mods

[gmoutdoorsman]

Im Looking to add some Cheap/free Horsepower to my old V6 4.3 (i know not to expect much).I have already done the Debaffled Throttle blade mod, descreened my MAF, Deleted the vortec silencer box. A friend gave me some Heddman Longtube headers that came off and older (TBI) 4.3. Im pretty sure they'll Bolt up with an aftermarket Y pipe and added O2 bungs. Just wondering if anyone can help me squeeze a little more fun out of my V6 without breaking the bank. The Vehicle is a 1998 Chevy 1/2 ton 2wd 4.3 Vortec (SFI)

 

[Ruger_556]

Im Looking to add some Cheap/free Horsepower to my old V6 4.3 (i know not to expect much).I have already done the Debaffled Throttle blade mod, descreened my MAF, Deleted the vortec silencer box. A friend gave me some Heddman Longtube headers that came off and older (TBI) 4.3. Im pretty sure they'll Bolt up with an aftermarket Y pipe and added O2 bungs. Just wondering if anyone can help me squeeze a little more fun out of my V6 without breaking the bank.

Re-gear the rear end... Best bang for the buck.

 

[gmoutdoorsman]

I have the GU6 RPO for 3:42 gears and i wouldnt mind going with 3:73's. But Im more interested in upgrading to a better diff, like a locker. If im not mistaken i have an 8.5 Rear end, and not sure what options i have. i want to find a junkyard complete rearend with a good posi unit.

 

[Ruger_556]

I'm going to do the same... I have 3.42's and 30" tires Absolutely gutless! I'm going to 3.73's. If you buy a G80 code 8.5 make sure you pop the cover off and take a good look at everything before paying for it! That 4.3 won't have enough power to hurt the factory GM "lockers" as long as it is intact when you buy it.

 

[TylerZ281500]

FF with 4.10s and sell the 4.3 for a 350. best bang for your buck because itll cost close to nothing.

 

[Ruger_556]

FF with 4.10s and sell the 4.3 for a 350. best bang for your buck because itll cost close to nothing.

This is a 5 lug truck... So no SF or FF axles

 

[TylerZ281500]

you can convert to 6 lug easily and 8 lug for that matter.

 

[gmoutdoorsman]

i was looking into a G80 but wasnt sure what year to get it from, did 99 and newer have 8.5's or are they 8.6's? and im not sure if the 88-98 had good posi units

 

[Ruger_556]

As long as you're staying close to stock the factory 88-98 locker was fine... I'm sure someone will chime in about how bad they are but GM engineers didn't design those to hang onto 35's behind a chipped 350.

 

[gmoutdoorsman]

so as long as its a G80 from our 88-98 its a 3:42 locker? are those auburn diffs? because im more less looking for more posi action. mose auburns ive delt with are too open.