v8 engine swap

[johnny]

hi,everyone.
i have a 1993 sonoma pick up 4.3z tbi auto tran 4l60e and 3.73 rearend., i also have a 1999 express van 1500 with a 5.7r votec engine,
i would like to put this engine in my 93 pick up can i get some help in what i need to do.the van tranny is shot it still run but when the tranny fluid gets hot it start shifting hard. first timer your help is needed please.
thank you for your help

[LS2Sonoma]

if this is your first swap, get a different engine. youre looking at changing a lot of the electrical system and fuel system

the engine you should be looking for is a 350 tbi. youll need the pcm to go with it but for the most part, that swap will be plug and play

[johnny]

hi,everyone.
i have a 1993 sonoma pick up 4.3z tbi auto tran 4l60e and 3.73 rearend., i also have a 1999 express van 1500 with a 5.7r votec engine,
i would like to put this engine in my 93 pick up can i get some help in what i need to do.the van tranny is shot it still run but when the tranny fluid gets hot it start shifting hard. first timer your help is needed please.
thank you for your help do i have every thing i need in this van to make this swap easy.

[LS2Sonoma]

do i have every thing i need in this van to make this swap easy.

noe

[neo71665]

To be easy your best bet would to be track down a 350 TBI intake and injectors. Put that on the 350 out of the van. You can reuse the throttle body from the 4.3 you just need bigger injectors from a 350. You can also reuse the 4.3 ECM you just need a chip from a 5.7 with TBI.


A total 99 engine/ecm swap is gonna be a wiring nightmare. It can and has been done but there is nothing easy about it. Expect to own a GM wiring diagram for both a van and s10 by the time you are done planing that part of it alone.

[94bb468]

if its your first time just plan on a carbed engine it makes everything easier. the wiring is so much simpler and you can use the van engine. just buy an intake to go to carb from summit racing .com or jegs and a carb use an hei distributor easy one wire hook up,and a one wire alternator makes life a lot easier. lol.

[johnny]

hey guy, i have a complete van its still running.can i just remove every think out the van,and make it work, this van has a 5.7 r engine and my truck has a 4.3z can you tell me how i can make this work, http://www.s10planet.com/forum/picture.php?pictureid=2121&albumid=255&dl=1271549125&thumb=1 (http://www.s10planet.com/forum/album.php?albumid=255&pictureid=2121) 1993 sonoma 4.3z and 1999 5.7r vortec express van conversion i would like to make this swap please,but i can do without your help any volunteer thank you:shake_125

[johnny]

Refer to post #5.


which intake,the intake i seen has six bolt on each side and my has four on each side,can you help me to find the one that would work.thank you

[neo71665]

if its your first time just plan on a carbed engine it makes everything easier. the wiring is so much simpler and you can use the van engine. just buy an intake to go to carb from summit racing .com or jegs and a carb use an hei distributor easy one wire hook up,and a one wire alternator makes life a lot easier. lol.


If done correctly the wiring for a TBI isn't any harder than a carb. All the wiring is already there for TBI (on 86-93 models). Its harder to cleanly remove what you don't need for a carb, unless you just do a hack job and cut stuff off even with the firewall.

[nomaboy]

Keep in mind that the 99 5.7 will have vortec heads so you need to make sure that the intake you get for it will bolt to vortec heads. It seems to me that the TBI intakes bolted to standard SBC heads. correct me if i'm wrong.

[94bb468]

you can still use your engine and have the tbi. order a carb intake for the vortec heads then buy a carb to throttle body adapter. use all the tbi parts off your 4.3 and do like was stated earlier and upgrade injectors and the chip.

[94bb468]

eliminating wiring dosent always have to be a hack job either. if done the right way and not just clipping off at the fire wall.

[johnny]

Keep in mind that the 99 5.7 will have vortec heads so you need to make sure that the intake you get for it will bolt to vortec heads. It seems to me that the TBI intakes bolted to standard SBC heads. correct me if i'm wrong.





you are right the intake for the vortec has 8 bolt and tbi has 12 im going to try the tbi adapter.does the 93 4.3 harness will fit 99 5.7 or would a 99
s10 harness vortec 4.3 fit

[94bb468]

well if you use the tbi adapter you could use your trottle body and sensors and your 93 wiring on that engine. the plus side is you get a really nice intake verses the ones they make for the tbi engines and the vortec heads are a pretty nice set up. you will have to use the distributor out of the vortec v-8 cause the v- 6 distributor wont work.