How good is the LO5 and what parts would I need to put the LO5 in and take out a LO3.

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Black 89 Formula
Stock 305 TBI
Automatiac, T-Tops
WS6 Package, Energy Suspension Bushings 3 inch flowmasters, open element air cleaner, always use sunco 94

 

Tools: You'll need a cherry picker. You'll need lots of metric and standard tools. Remove distrib, TB, and coil. Unhook fuel lines from the rubber fittings next to the power steering! Be careful, have somebody watch underneight that your tranny lines don't get bent when you pull it. You don't need to remove the radiator or accessories! If you have A/C which I think you do, just tie it off to the side but don't bend the solit tubes!
Support the engine with the picker, unbolt the tranny bolts, tcc from flexplate, and motor mounts. Pull engine. Swap all the sensors over EXCEPT the knock sensor. You need to pickup a knock sensor for a 350. Reinstall engine! It's that easy.
I recommend an 8" harmonic balancer and a new waterpump when you do the swap. With that said, you should have the swap done in a 20 hour weekend. That's if you have all the parts and a few friends that know what they're doing.
Are you going to be using the stock 8746 ecm? If so you might want to pickup a cop car eprom. They are the only vehicle to use a 350 (the lo5) and the 8746 ecm!
E-mail if you need hookups for the eprom and trust me...you WILL want the cop car eprom if you do the swap.

 

It is pretty much a bolt in but there are a number of additional things you need to do.
Off the top of my head you need to change your injectors to the 350 61# or the 68# cop injectors. Use a 350 knock sensor and ESC module and the 350 cop chip will make it run pretty well, especially if you have an auto trans.
I would at least put a better cam in the engine if you can afford it. IF you got the time and money I would sell
the new lo5 swirl port heads and get some
better versions. this would require more prom work. There is a TON of stuff on this swap in the achives and it is worth your while to spend some time reading up. I could not have done my swap without this board and
the posts regarding this specific swap. I know I forgot some stuff so check out the archives
Good luck............bob

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91 camaro RS convert,GM crate 350 with LT1 cam,edelbrock 6085 heads,9.5:1 comp, edelbrock TBI intake bored to 2", 65# injectors,454 TB, Command perforance custom chip(still tunning) ,dual fan conversion,
ultimate TBI mods,TBI spacer,SLP 1 5/8 headers,
3"cat back,Flowmaster,
T-5, centerforce 2 clutch, 3.42 torsen posi,alston SFC's,Global West LCA relocation brackets, edelbrock STB

 

thanks for your help guy.
but I dont think I will be able to do it.
last night I was driving and this jerk in a jeep cut me off and I lost control and hit a pillar I am ok but the car was totaled.

------------------
Black 89 Formula
Stock 305 TBI
Automatiac, T-Tops
WS6 Package, Energy Suspension Bushings 3 inch flowmasters, open element air cleaner, always use sunco 94

 

That's the 2nd car this week and there isn't even snow on the ground!