well iv been planing on replaceing the 305 i have in my camaro causes its starting to get tired (292,000 miles) so i was planing on doing a lt1 swap but i dont think i have the experiance to pull that kind of swap yet so iv been thinking of just throwing in a 350tbi out of a suburban or somthing but i had a few questions just to clarify everything and i know most of u will probley just say but i couldnt find to clear of answers so.


first question im looking at a engine on craigslist its a 350tbi out of a 91 suburban but i herd somewhere (some car show i think) that for a engine swap the engine has to be newer then the car to be able to pass emissions wich i need the car to do. so is that true or sould i just look for a new engine?

second as far as all the parts i need for the swap dont i just need
* 350 ESC module
* ecm & injectors
* Headers

or am i forgetting some stuff? and will the 305 harness work? i wont have to do any wiring right?

 

I have a whole TBI unit(with ultimate TBI mods) with 350 injectors in it, and 2 350 tbi ECM's(one from a 91 Roadmaster and one from a blazer.... If you need anything let me know i did this swap already. I actually have 3 tbi units.... 305 TBI to 350 TBI, easiest swap you could possibly do, everything is the same, just bolt up and go.... its pretty simple.... yes the 305 harness will work...

 

The 2 ECMs work fine, i originally had the Blazer ECM and i didn't like it b/c the stock tune only allows the rpms the run out until about 4800 rpms then the injectors are running static and the engine will runs like crap until the car shifts again... the Roadmaster ECM fixed this problem but it had a speed limiter set at 110... but i had a chip burned to remove that, haha

 

That is true. It also means a Suburban/truck engine/ECM is not legal.

It could be argued that the LT1 swap would be easier than what it might take to get a TBI 350 properly tuned, depending upon what else you did (like the headers).

 

i am doing the same swap but with tpi(even harder). You will need to get your prom in the computer retuned. For that you can type howell motors in google and send them an e-mail about what to do about the computer. You also need to find a motor that will have the same lower intake, so that it will bolt up the right way and you'll have no problems. But thats about all i know (so far) how to do along with what the other people said about injectors

 

would it pass if i could find a 350 from a caprice instead of a truck? . i was just thinking that the lt1 swap would be alot more wiring and im not the best at that lol

 

The 350 system from a Caprice would at least be legal.

The LT1 wiring isn't all that difficult. Running AC is a lot more difficult.

 

hmm well ill keep a look out for a lt1 and caprice 350 and see what i can find thats a good deal. i wasn't planing on running ac anyway so maybe ill just go right to the lt1 i just have never done a engine swap before so i thought it would be over my capabilities. ill just have to do some more research about the lt1 swap

 

ok after some research i think i get everything i need to do for the lt1 swap (fuel lines,fuel pump, power steering lines, ect) but the only thing that i really dont get is the wiring. and thats the one thing with cars that i like to stay away from. so is there a place where i can get a harness made to where i can just plug and play and not have to do any splicing of wires cause i really dont what to mess up my car, plus i found a lt1 from a 95 z28 on craigslist for 500$ with 80k miles but it doesn't have the harness or pcm.

 

Not sure if you've looked at it yet, but there is an LT1 swap sticky https://www.thirdgen.org/forums/engi...questions.html

Personally, I'm cheap. I can't see spending $500-$700 for something that I can do myself. Yes, you can send your harness off to someone and have them modify it so it clicks into your car, but the amount of rewiring it takes to do this is really very minor. And, you'll learn more about what makes your car tick.

Up to you, though.

 

ya i see your point ill guess ill just have to get every thing i need for the swap and see if the wiring is with in my capabilities cause i to am cheap and i dont really want to spend more on the wireing than the engine (but i willl if i have to) but anyway thanks for all of your help