Ok so i have a formula with the stock 305 that i want to keep the fuel injection but swap the actual engine to a chevy 350. I want to know what what all needs to be done for this Im assuming a can just switch the heads and manifold on the engines because i believe they will all match up but what would i do about the computer? Thanks

 

Your leaving alot of information out of your post. Your Lb9 has a one piece rear man seal so depending on that the 350 is you might need a flexplate or flywheel. You don't state what heads are on your 350 they maybe better that your 305. The intake you have on the 90 is a 87 up center 4 botls are at a different angle than 55up sbc, you can elongate the bolt holes or buy a 85-86 tpi intake depening on your head choice. you will need #22 hr injectors for the swap and you need to reprogram your memcal or do a piggyback adapter tune. To Make the knock filter and knock sensor correct the most common aujp memcal is over $300 now. The search bar and stickies will be your friend.

 

If the 350 heads are stock from 1979, then there is no way no how they are better than the '90 LB9 heads.

Of course, if you put your LB9 heads on the 350, your TPI will bolt right up. And, you might be close to the compression ratio of the LB9 when you get done.

Yes, you will need a 153-tooth, 2-piece RMS flexplate. The '82-'85 3rd gen V8 automatic application will get you what you need.

 

Ok that was the plan. What will I have to do about the computer. And will I still need the injectors?

 

http://www.southbayfuelinjectors.com...tors_More.html

bosch 3 22#hr you are still leaving unanswered questions , what transmissions are you going to be using ?

 

Ok first of all im sorry im typing this off of a phone. it is a stock auto off of the firebird and I dont know much about the 350 it belongs to my cousin and it runs well plus it is stock. Id prefer to keep the tranny ive been told they gave them the same tranny on both style engines. I couldnt tell you much more the bird just got the shop and the 350 is my cousins like I said and he aint got a clue about but he takes good care of it. The 305 is shot and id like to upgrade anyways. The computer is my biggest issue right now that im trying to figure out. Thanks for the help I really appreciate it.

 

the aujp broadcast code would be the best to get you going for a mild 350, you can use a piggyback adapter from moates.net and run the same memcal you are using now with the aujp .bin, buy a gm 16151348, find a used one or get a non working converted v6 off of ebay.

 

So my best and least painful way to do it is to get my hands on a 350 memcal and ill be good is what your saying. And that I can just transfer the heads and intake from the 305 and ill be fine?

 

yes, and you will also need 22#hr injectors.

you could use this piggyback attached to your memcal.

https://www.thirdgen.org/forums/engi...-121322-a.html

 

Thanks man You've been alot of help.

 

 

I'm not sure that 22lb injectors and a 350 memcal is really necessary or even the best choice. Those were designed to work with an LB9, not a wheezy 79 350. That 79 will probably make less power than the 305, and will require a completely unique tune. To be honest, if it was my car, I'd never drop that motor in. It's a low compression smog motor with crap heads, crap cam, and a 2 piece rear main seal. I doubt it would even match the performance of the 305.

 

Im also contimplating buying a crate 350 and just going with the injectors, intake, and the memcal because the heads on the 305 are in a serious need of a valve job and summit has them for a decent price.