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Thread: Early Classic motor mounts

  1. #1
    Join Date
    Jan 2006
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    Las Vegas, Nevada
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    328

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    Modifiying my frame today for these LSx conversion mounts and was wondering if anyone has used these mounts for 63-72 GM trucks? Seems they narrowed the frame rails in 68 to accomodate big block frame stands so I need to remove about 3/8 to 1/2 inch from each frame rail and then, according to Early Classic, things will line up to fit.... I'll post again after I modify the frame with my results if anyone is interested. Pics will follow if I can size them right...

    1965 C-10 shortbed stepside, 2003 5.3/4L60E conversion. Power steering, tilt wheel, power front disc brakes, 3.73 one wheel peel, 2.5/4 inch drop, relocated fuel tank and battery, 2002 Silverado buckets and console. Swap Pics
    1968 Camaro 95LT1/4L60E lots o' mods Web Page
    1961 Corvette project.......... C-4 suspension and brakes, 02 LS1/T-56 awaiting installation Pics

  2. #2
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    Jan 2006
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    Progress report: Test fit motor on mounts, fits OK. Minor clearance issues with the stock exhaust manifolds against the frame but the mounts clear the manifolds unlike the previous setup I tried. (stock motor mounts with S&P style adapters for the motor), haven't checked the A/C compressor yet...looks like it'll be tight.... Next step, pull the motor back out, attach to trans, drill a few holes on the crossmember for the mounts, do a little grinding then drop the motor and trans back in. Pictures to follow after I resize them....

    1965 C-10 shortbed stepside, 2003 5.3/4L60E conversion. Power steering, tilt wheel, power front disc brakes, 3.73 one wheel peel, 2.5/4 inch drop, relocated fuel tank and battery, 2002 Silverado buckets and console. Swap Pics
    1968 Camaro 95LT1/4L60E lots o' mods Web Page
    1961 Corvette project.......... C-4 suspension and brakes, 02 LS1/T-56 awaiting installation Pics

  3. #3
    Join Date
    Mar 2003
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    San Marcos Texas
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    Looking good! Man that makes me want to upgrade Grandpaw's '65 from that inline 6.
    2006 Superior Blue Trailblazer SS AWD, Stock as a rock

    Sold: 2002 GMC Sportside Denali front end with a 2002 LS1, FLT level 5, Yank 2600, Trick Turbo, T76, Nelson intercooler, 60LB injectors, Warbro fuel pump, Eaton locker, Magnaflow, 3.42, Nelson Performance Tuning (speed density).

    Sold: 1981 GMC LB RC 1500 2002 4.8L 4L60E 12 bolt 3.73 Richmond Lock Right AC PS Nelson Performance tuning

  4. #4
    Join Date
    Nov 2005
    Location
    ohio
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    1,712
    nice work , old trucks kick ass with new drivtrains, awesome!
    07 SILVERADO CLASSIC 2500 HD 4x4 CREW CAB LT3 DURAMAX LBZ/ALLISON 6 SPEED 5'' MBRP Turbo back exhaust 6'' TIP /NO CAT- NO MUFF/ AFE Intake/ EDGE HOT JUICE /MERCHANT AUTO STG III Built Allison/P I ConverterTTS Twin Lift Pumps. Tierod sleeves/Cognito braces.17x9 Moto metals_______ Old Truck ,04 Z-71/Turbocharged,/cam/stall/Zippy Built TRANS/Nelson Tuned------

  5. #5
    Join Date
    Jan 2006
    Location
    Las Vegas, Nevada
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    328
    Code:
    GMCwantsLS1Looking good! Man that makes me want to upgrade Grandpaw's '65 from that inline 6.
    Yeah, that's were I started about 10 years ago with the straight 6... good little motor till it pitched a rod through the side of the block.... I replaced that with a 350 carbed motor from my Camaro (that I had swapped a 95 LT1 into, but that's a story for another forum.... . )
    So now that motor is now coming out and the 5.3 going in....

    1965 C-10 shortbed stepside, 2003 5.3/4L60E conversion. Power steering, tilt wheel, power front disc brakes, 3.73 one wheel peel, 2.5/4 inch drop, relocated fuel tank and battery, 2002 Silverado buckets and console. Swap Pics
    1968 Camaro 95LT1/4L60E lots o' mods Web Page
    1961 Corvette project.......... C-4 suspension and brakes, 02 LS1/T-56 awaiting installation Pics

  6. #6
    Join Date
    Mar 2003
    Location
    San Marcos Texas
    Posts
    4,393
    Yeah, that's were I started about 10 years ago with the straight 6... good little motor till it pitched a rod through the side of the block.... I replaced that with a 350 carbed motor from my Camaro (that I had swapped a 95 LT1 into, but that's a story for another forum.... . )
    So now that motor is now coming out and the 5.3 going in....
    [/b]
    That is what the first 292 did, it was replaced with a rebuilt 292. Dad still drives it with the three on the tree. If it lives at my house for anytime, I'm going to change it!
    2006 Superior Blue Trailblazer SS AWD, Stock as a rock

    Sold: 2002 GMC Sportside Denali front end with a 2002 LS1, FLT level 5, Yank 2600, Trick Turbo, T76, Nelson intercooler, 60LB injectors, Warbro fuel pump, Eaton locker, Magnaflow, 3.42, Nelson Performance Tuning (speed density).

    Sold: 1981 GMC LB RC 1500 2002 4.8L 4L60E 12 bolt 3.73 Richmond Lock Right AC PS Nelson Performance tuning

  7. #7
    Join Date
    Jan 2006
    Location
    Las Vegas, Nevada
    Posts
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    Update: Swung the motor and trans, installation continues. Did the clearance work required for the stock exhaust manifolds, and the A/C compressor fits! I'll need to get and/or modify line A/C fittings however as there is not that much room. These mounts placed my motor further forward than I would have liked precluding use of the mechanical fan.... and it looks like there will be minimum clearance for electrical fans.... I'm trying something new on picture attachments, hopefully this will work.... Ive checked the help files on posting and there is not much guidance on picture attachments.... anyone want to give a newbie some assistance?

    1965 C-10 shortbed stepside, 2003 5.3/4L60E conversion. Power steering, tilt wheel, power front disc brakes, 3.73 one wheel peel, 2.5/4 inch drop, relocated fuel tank and battery, 2002 Silverado buckets and console. Swap Pics
    1968 Camaro 95LT1/4L60E lots o' mods Web Page
    1961 Corvette project.......... C-4 suspension and brakes, 02 LS1/T-56 awaiting installation Pics

  8. #8
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    Picture worked great. Have you thought about sliding the engine back towards the firewall until you have about 2" of clearance and then modify the mounts to work in that position. I couldn't imagine having to settle for it sitting too far forward. You can always have a mobile welder come make custom brackets for you if you can't take it to them by tow truck. I haved used my AAA membership a time or two for items/work like that.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  9. #9
    Join Date
    Mar 2003
    Location
    San Marcos Texas
    Posts
    4,393
    I think your pictures are working out fine! They are thumbnails for dialup users and can be expanded for detail!
    2006 Superior Blue Trailblazer SS AWD, Stock as a rock

    Sold: 2002 GMC Sportside Denali front end with a 2002 LS1, FLT level 5, Yank 2600, Trick Turbo, T76, Nelson intercooler, 60LB injectors, Warbro fuel pump, Eaton locker, Magnaflow, 3.42, Nelson Performance Tuning (speed density).

    Sold: 1981 GMC LB RC 1500 2002 4.8L 4L60E 12 bolt 3.73 Richmond Lock Right AC PS Nelson Performance tuning

  10. #10
    Join Date
    Oct 2005
    Location
    Baton Rouge, LA
    Posts
    997
    What's the space specs on the 60's trucks versus the 80's trucks?

    The mounts I got from BRP (and the way I mounted them) puts my 5.3 about 4" off the firewall in my '86. The reason I'm leaving this way is because I'd like to leave the 5.3 compressor in the stock location. If I switched the mounts to the opposite side & direction, the 5.3 would move back 2". As it stands I'll have 2" clearance (at the most) with e-fans.
    Test-n-Tune (Nov 23, 2008) - 13.65s @ 98mph

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