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Thread: LT1 conversion

  1. #1
    Senior Member tboz65's Avatar
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    LT1 conversion

    Just curious who all has done a LT1 conversion, the Advance adapters V8 swap motor mounts will work? Also does anyone know if the standard V8 swap hedders will work on a LT1?

    I have the opportunity to purchase a 97 LT1 w/6 speed transmission for 1000$, it has 60,000 miles on it, comes with everything...serp belt to tailshaft and computer and wiring.......now there is no doubt that I will be buying the motor, just curious how many problems I will be running into........

    Unfortunately I won't be using the transmission, selling it to a friend, just looking for some info on the swap
    America, Love it, or get the hell out!

  2. #2
    Registered User ZZ4Blazer's Avatar
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    Motor mounts and headers will work just like any other sbc.
    Jim 94 Stepside
    ZZ430 clone V8
    NX kit in the works
    Tremec T56 6 speed
    8.5" rear
    Quote Originally Posted by Harley
    Go before show any day of the week.

  3. #3
    Senior Member tboz65's Avatar
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    Thanks, I figured you'd have the answer, I was going to PM you but I know there area couple of other guys on here that have done this.

    I thought that the LT1's had a slightly different head design as far as port placement, but its late.......or early, depending on how you look at it......

    I guess its going to be getting headers, a crank pulley, and a programmer right off the bat........stock Z's look out, your gonna get smoked by a 4dr blazer.......
    America, Love it, or get the hell out!

  4. #4
    Registered User ZZ4Blazer's Avatar
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    I've seen guys running the sanderson shorties, and hedmans on LT1's, with no mods.

    The LT1 motor is a little different installing. Some of the accessories can cause frame clearance problems. Not sure which ones.

    Too bad that 6 speed is already sold. I'd be willing to take off your hands. :bigthumb:
    Jim 94 Stepside
    ZZ430 clone V8
    NX kit in the works
    Tremec T56 6 speed
    8.5" rear
    Quote Originally Posted by Harley
    Go before show any day of the week.

  5. #5
    WhiteBlaze350
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    was it hard to change it over

  6. #6
    Puttin the "Sport" in SUV hivoltagedriver's Avatar
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    I am also picking up a '97 LT1/ T56 combo on the cheap to put in my '91. I probably won't actually get around to doing it for a couple of months, but I would be interested in hearing what you went through to get it to work. By the way, if your LT1 came out of an F-body and not a vette, watch out for clearance between the a/c compressor and the frame. You might also check out www.lt4blazer.net. This guys has already done it, and has a nice ride.

  7. #7
    First gen fool SonomaZ's Avatar
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    Just curious what you'll be running for a trans. since you got rid of the 6 speed?

    The A/C compressor on the F-body LT1's sits right on top of the frame on a Blazer. Tight, but fits without cutting, or so I've been told. (Engine sits about an inch higher in a Blazer versus an S-pickup.

    If you get Hedman or Sanderson shorties, make sure you get the 1-5/8" primary tubes. The 1-1/2" is too small for an LT1 and VERY restrictive on the exhaust port. Lots of port mismatch.
    I've also been told (but haven't yet personally confirmed) that Sanderson will build a set of shorties with LT1 specific port flanges.
    '92 Jimmy, 4.3 CPI/auto, 2dr,2WD, 3/4 drop, 3.73's w/zexel. Bodywork in progress, LT1/6spd getting dusty.
    '94 Blazer w/GMC superiority complex, 4.3 TBI/5 spd, 4dr,4WD, 255/55/18's, fresh blue/black metallic.
    Originally posted by Blazin Low
    I keep mine nice and lubed with anti-sieze and it helps out alot...
    :D

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