GM B-Body Forum, 77-79 Caprice/Impala Forum

Join Now If Your A 1977- 1979 Caprice or Impala owner or other GM B-Body owner!!!
Like us on Facebook

GM B-Body Forum, 77-79 Caprice/Impala Forum

Would you like to react to this message? Create an account in a few clicks or log in to continue.
GM B-Body Forum, 77-79 Caprice/Impala Forum

A forum for all the owners and enthusiasts of General Motors B-Bodies from 1965-1996, but dedicated to the owners of 1977-1979 Impalas and Caprices. Join up now!

    ls engine swap

    Junior Member
    Junior Member

    Posts : 16
    Join date : 2015-07-23

    ls engine swap Empty ls engine swap

    Post  alusil850 on Thu Jan 03, 2019 4:07 pm

    I would like to use ls 6.0 vortec for my restaured 77, with a th350 and stock transaxle.

    somebody allready do this swap?

    first, I thinking about a fuel flex and driven by wire trottle, but will I have enought space for oil pan, for hood, engine mount wil fit?
    ls to th350 mount and tuning?
    stock transaxle will be strong enought?

    thanks for advice.

    77 caprice complete rebuild in progress
    cad SRX
    S8 2000
    Auto Novice
    Auto Novice

    Posts : 58
    Join date : 2016-05-25
    Age : 44

    ls engine swap Empty Re: ls engine swap

    Post  BrokenBlazerDave on Fri Jan 04, 2019 6:01 pm

    I have done this swap on my 1981 Buick Lesabre which is a B body car with a similar amount of room that you have. Using Flex fuel is fine as long as you have a spot for the fuel sensor whether it is on the fuel rail or the sending unit depending on the set up you use. Drive by wire is easy as long as you can make the pedal assembly fit where you need it. You will not have enough space for a stock truck oil pan unless it is highly modified. I used a Holley oil pan number 302-2 and I like the way it fits. I was able to clear the stock hood on my Buick with a stock Gen 3 truck intake without the cover. No doubt the car intake would give you more room but if you are using a truck for the 6.0L engine the car intake will complicate the water pump/belt routing situation. I used the stock clam shell mount on the frame with new Energy Suspension inserts with Holley 12643HKR motor mounts on my engine.
    Putting the LS engine to a TH350 is easy. The Gen 3  6.0L engines I have used have a spacer on the crank to support the TH350 torque convertor snout. From what I can remember the flex plate will bolt right up to the TH350 torque convertor as well.
    It is hard to say if the stock transmission and rear axle will be strong enough. If you drive easy it will likely take it. If your transmission has a million miles on it and your rear axle is a 7.5" open diff and you want to do burnouts all the time it probably won't.

    This is the link for my build thread. It is kind of two builds in one. I started on one car and jumped to another.

    What is the engine you are using coming out of?

      Current date/time is Mon Jul 06, 2020 12:37 am