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Thread: 5.3 into a 86 K5 Blazer (Advice)

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  1. #1
    Join Date
    Aug 2005
    Location
    Spring, Texas
    Posts
    527

    5.3 into a 86 K5 Blazer (Advice)

    Hey Guys,

    I did a little research but was wanting to know if you guys could lead me in the right direction for what i will need to make this swap work.

    I currently have a 305 with a 700R4 and it is 4x4.

    I have the complete 5.3, but i need to know about oilpan clearance, motor mounts for 4x4 and what kinda flywheel? What headers will fit?

    If any one has done this swap and has a parts list that would be freakin' awesome!!!!

    Thanks for your help!

    Brent
    Last edited by bulldog5.3; 05-20-2009 at 01:00 AM.
    06 TrailBlazer SS LS2 4.10's

    02 SC StepSide Factory Orange
    Full Bolt-On 370 - Little Cam- Victor Jr Intake -Worked 5.3 Heads - 4.56's - Built 60E - Circle D 4000

    07 CTS-V CAI, GM Performance Exhaust, Ported TB, Coil Overs

  2. #2
    Join Date
    Aug 2005
    Location
    Spring, Texas
    Posts
    527
    Come on Guys, surely someone has done a similar swap??????????????????????????????
    Last edited by bulldog5.3; 05-20-2009 at 05:50 PM.
    06 TrailBlazer SS LS2 4.10's

    02 SC StepSide Factory Orange
    Full Bolt-On 370 - Little Cam- Victor Jr Intake -Worked 5.3 Heads - 4.56's - Built 60E - Circle D 4000

    07 CTS-V CAI, GM Performance Exhaust, Ported TB, Coil Overs

  3. #3
    I take it you are using the old tranny? If so you will have to get a flywheel conversion from advance adapters i think the part number you need is 712500A and the only other thing with the tranny is that you would have to rig something up for your kick down. I also got the motor mounts from advace adapters but i have heard that there are better mounts out there so you can use the stock drive shafts. The headers that I am running are the ones from street and performance and they are the midlength ones they sell. You may have to modify the front crossmember a little so the pan doesnt rub. If there are any other questions that you have feel free to ask.

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