Thinkin about a tbi swap.

[Kapdin]

So my brother is sold on us swapping in a tbi. We have a rusted out 91 k1500 with a 350. The truck is junk but the motor was just fine untill a mouse got ahold of the wiring. Will that motor bolt up to my TH350? And since the harness is prolli mouse food anyone have a harness done up for this swap? Also can a set of vortec heads just be bolted to that motor?

 

[8T6K5]

Dunno about the motor to tranny mount, if it doesnt directly Im sure there is an adapter out there.

Vortec heads, yes...will make a great improvement.

As far as the harness...is it Jims here that does those...quite well I hear?

 

[usar17]

If you swap on Vortec heads you will most likely need the ECM chip re-programmed.

Tranny shouldn't be an issue at all

 

[Kapdin]

yea was hoping jim will chime in here. a quick google search shows that a truck th350 is a direct bolt on other than the crossmeber being 5/8" off set so new holes be dilled.

 

[usar17]

idk about new holes :/ frame may already have holes where you need them to move the crossmemeber. and Jim seems to be the TBI master. There is another gentleman on here though that excels at wire harnesses

 

[Kapdin]

So since im going with a th350 and have a complete donor truck, what other parts are needed? Now since im going through the trouble once the motor is pulled, i want cam, intake, headers, and ill find a set of vortec heads. Based on this list shoot me some part numbers or what to look at.

 

[kleedus]

oneluckypops luke is awsome with wiring harness work

i had him do my vortec harness i sent him a 30 pound box of wiring every wire out of my 96 tahoe donor

he sent me back a sweet modified harness cut out all the ********* i did not need and custom built my harness to fit what i wanted. kept the 96 cruize control took out the egr ******** and so on.

he labeled every plug and every wire what it was and where it hooked up

i will have more harness work and will hit him up again in the future

he gave me a good price for the work he done and he done top notch work

 

[Jims86]

T350 will bolt right up.
Vortec heads are a good addition, but you need a specific InTake manifold, and a boatload of tuning. It can be done though.
What will be the purpose of the truck that it will be in...if its a workhorse, stick with the TBi heads.

 

[Kapdin]

humm, yea its for the 79 which is just a work/play truck, no dragracing but just stout and pull wat ever i hook to it. and i don't like the tunning part : /

 

[Kapdin]

also id deff hit jim or onelucky up on the harness but what mods realy need to be done? i don't want/need emmisions at all, maybe if the cruise could get swapped but really don't care.

 

[Jims86]

humm, yea its for the 79 which is just a work/play truck, no dragracing but just stout and pull wat ever i hook to it. and i don't like the tunning part : /

TBI heads will do that just fine. I had mine to 230 hp and around 406 tq with those heads.

 

[Kapdin]

haha dang, 406tq matched with a t350 and 4.10 gears sounds like a pullin machine. Ok so just pull the motor, ill take the heads to the local machine shop and have them freshen them up and maybe see if they will polish them a bit, then cam, intake, headers. sounds like a good enough list.

 

[Jims86]

haha dang, 406tq matched with a t350 and 4.10 gears sounds like a pullin machine. Ok so just pull the motor, ill take the heads to the local machine shop and have them freshen them up and maybe see if they will polish them a bit, then cam, intake, headers. sounds like a good enough list.

Exhaust side is most benificial on the TBI heads for porting. As far as harness, just keep the egr...not sure what else is on the truck, it varies.
vSS, P/N switch are all thats needed to be figured out since you are going with a TH 350. Then there are 3 power wires, 2 from switched key power for the ecm and Injectors, and a constant hot from battery power for ecm memory, which can be snatched from a shunt on the fuse block.

 

[usar17]

Guess this is a good time and place to ask..

What is a shunt? I see where they are on a fuse block, but what do they do?

 

[89Suburban]