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Can't get my Mac mid-length to slide in

This is a discussion on Can't get my Mac mid-length to slide in within the General Help forums, part of the LSx Technical Help Section category; I'm dying to crank my car after finishing my 383 build up, but the only thing stopping me is getting ...

  1. #1
    Junior Member greenvilleTA's Avatar
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    Can't get my Mac mid-length to slide in

    I'm dying to crank my car after finishing my 383 build up, but the only thing stopping me is getting the passenger side header back in place. No matter what I try, I can't get it in place. I've tried it through the bottom til I was blue in the face and also took my valve cover off and tried from top. What the hell is going on??? I had a shop install the headers and ORY before, so I don't know how they got them in. Do I have to loosen the motor mount and jack the motor up???

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    Junior Member greenvilleTA's Avatar
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    Ground the tab off the block and it slid right in...

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    Senior Member ss~zoso~ss's Avatar
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    you would have had to jack the motor up i think, but i remember reading about cutting off the tab on the block

    i was soo close to buying MAC mid-length's but i decided to save the little money i had

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    Just me Y2KPewterSS's Avatar
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    I can't understand why you had trouble with the passenger side is usually the easier of the two. Did you have the starter pulled?
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    Veteran 0rion's Avatar
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    Quote Originally Posted by Y2KPewterSS View Post
    I can't understand why you had trouble with the passenger side is usually the easier of the two. Did you have the starter pulled?
    That's what I was thinking also. The passenger side was actually easier on my LT install. It's the drivers side I had to whittle on the casting tab.

  6. #6
    Junior Member greenvilleTA's Avatar
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    Starter on...starter off...I tried everything. The block is a new 2006 LSX block, which probably doesn't make a diference, but until I got the tab off, the header would not go in, no matter how hard or long I swore at it. I got the drivers side in place in about 45 seconds. After the tab was removed, only took about 2 minutes. I don't know what the deal was, but it wasn't going in without some kind of intervention.
    I did get it cranked last night and all sounded good, so I guess I need to update my sig...

    98TA/Eagle 4.0" Stroker Crank/6.125 Eagle 4340 H Beam Rods/Mahle Forged Pistons/Mahle File to fit Plasma Moly Piston Rings/LS6 High Flow Oil Pump/Patriot Stage 2 LS6 heads/Harland Sharp shaft mount aluminum roller rockers/SLP Lid/Free ram air mod/Smooth Bellowes/160 stat/Taylor 10.4mm wires/Comp 232/234 595/598 112 lsa/patriot gold springs/chrome-moly push rods/LS1 Edit/LS6 intake and p&p throttle body/Spec3 clutch/Fidenza aluminum flywheel/Motive 4.10/MAC mid-lengths/MAC ORY/SLP catback

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    Senior Member INMY01TA's Avatar
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    Get a big pry bar (several feet in length) and wedge it up in there and just "move" the engine over a little. Seen it done, works.

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