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86 k10 engine swap

This is a discussion on 86 k10 engine swap within the Classics forums, part of the General Discussion category; I have an 86 k104x4 was wondering how big of a project to go from a small block to a ...

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    86 k10 engine swap


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    I have an 86 k104x4 was wondering how big of a project to go from a small block to a big block ? It has a 700r4 trans in it i'm pretty sure that will bolt up not sure on the motor mounts. Also has anyone heard of the left rear upper shock mount ripping the frame where it monts to?

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    Intenionally blank b454rat's Avatar
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    Re: 86 k10 engine swap

    Unbolt small block, bolt in big block. Only real issue is p/s pump, they won't interchange.
    Last edited by b454rat; 10-07-2011 at 06:33 PM.

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    Re: 86 k10 engine swap

    Thanks thats great news. are you talking about the bracket that holds p/s pump?

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    Hammer Down!!! 1badbowtie4x4's Avatar
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    Re: 86 k10 engine swap

    very easy like b454rat said, but good luck getting the trans and axles to hold up over time.
    '84 k20 Silverado- 12" Superlifts, 38.5 XML's, 454/th400/np208/14b-FF/10b~SOLD
    '83 k30 Silverado- 4" susp, 35" Boggers, 454/sm465/np205/14b-FF/d60~Weekend truck
    '99 Ram 2500 4x4- CTD/NV4500/NP241HD/D70/D60/150PGH FASS/150hp DDP's/4in straight pipe to 6in single~DD

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    Re: 86 k10 engine swap

    Already found a 14bolt ff and a d60 with 4:56 gears. Gonna try and fit a 38x12.50x15 under it with a 6 in lift. We'l go with that till the tranny goes but it does have a fresh rebuild on it.

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    Hammer Down!!! 1badbowtie4x4's Avatar
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    Re: 86 k10 engine swap

    sounds like your set! but i would keep an eye out for cheap sm465 or th400 because you will most likely need it down the road.
    '84 k20 Silverado- 12" Superlifts, 38.5 XML's, 454/th400/np208/14b-FF/10b~SOLD
    '83 k30 Silverado- 4" susp, 35" Boggers, 454/sm465/np205/14b-FF/d60~Weekend truck
    '99 Ram 2500 4x4- CTD/NV4500/NP241HD/D70/D60/150PGH FASS/150hp DDP's/4in straight pipe to 6in single~DD

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    Re: 86 k10 engine swap

    i would say if you built the 700r4 good enough it would survive pretty well..

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    Re: 86 k10 engine swap

    Well i am pretty sure i just traded my built jeep for a 1980 one ton flat bed 4x4 with a 454 in it plus some cash. How would the dually rear wheel convert to a single rear wheel? I hope everything will go good on all the swaping over might put the motor on a stand until huntin season is over and build it pretty stout.

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    Re: 86 k10 engine swap

    Quote Originally Posted by magnum12 View Post
    Well i am pretty sure i just traded my built jeep for a 1980 one ton flat bed 4x4 with a 454 in it plus some cash. How would the dually rear wheel convert to a single rear wheel? I hope everything will go good on all the swaping over might put the motor on a stand until huntin season is over and build it pretty stout.
    the axle widths are different are different on srw and drw 14 bolts....find a srw one and save the headache

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    Intenionally blank b454rat's Avatar
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    Re: 86 k10 engine swap

    You can convert the dually to single, but need the single parts to do it. Be easier to just get the singe rear axle.

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    Re: 86 k10 engine swap

    Quote Originally Posted by trickedout420 View Post
    the axle widths are different are different on srw and drw 14 bolts....find a srw one and save the headache
    Yea I found out that drw 14 bolt is narrower than the srw. But i was told that you could just use a wheel spacer on the rear to make them match up. I am with yal mite just try to do some trading for a srw. Think i am going to wait till after deer season to do it so i should have plenty of time to see what i need. Not even for sure this guy is gonna trade we talked last night and was a 1000 dollars off he is going to call back today. If he does i will post back , then i will really be asking some questions.

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    Re: 86 k10 engine swap

    I'm just concerned about the transmission

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    hucking fates this server FordeatinZ71's Avatar
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    Re: 86 k10 engine swap

    well, the stock 700R4 isn't gonna hold up to even a mild 454 long if you're hard on it. but...if you have that 700R4 built to the hilt it will easily hold what that 454 can dish out. if you don't care about OD though i'd swap in a SM465 or Th400...they'll hold the power of a stock/mild 454 stock with no modifications. sounds like you are gonna have one bad@$$ 86...post some pics for us to look at!

    2004 GMC Sierra SLE Z71 rcsb, 5.3/4L60E/3.73/G80 time bomb...3" lift, tinted 03+ Silverado tails, plasti-dipped 16" wheels (unknown brand), 285/75/16 Thunderer M/T Extremes, Thrush Welded muffler...

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    Re: 86 k10 engine swap

    I will try and get some good pics up soon. Well yal was right about the 700r4 . On the way home from beer camp 4th gear started slipping pretty bad . When I got home i checked the fluid and it was a pint and half low so i went to town and got some lucas auto trans fluid. Went for a test drive about a 12 mile loop and it only did it once and it was not as bad at all . Crossing my fingers that was all that was wrong with it. But when the big boy engine goes in it looks like it is coming out I just hope that it holds till deer season is over cuz i think i just sold my jeep today but who knows talk is talk cash is great.

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    hucking fates this server FordeatinZ71's Avatar
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    Re: 86 k10 engine swap

    damn dude, i'm sorry to hear that. you didn't even have the 454 in it yet, did ya?

    2004 GMC Sierra SLE Z71 rcsb, 5.3/4L60E/3.73/G80 time bomb...3" lift, tinted 03+ Silverado tails, plasti-dipped 16" wheels (unknown brand), 285/75/16 Thunderer M/T Extremes, Thrush Welded muffler...

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    Re: 86 k10 engine swap

    No the 454 is not in and won't be for a while. Like I said i am hoping the trans will hold up maybe the low fluid issue was causing that . That's all i can hope for now . If it aint that will put a stop to any other projects cuz that will for sure mob the money .

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    hucking fates this server FordeatinZ71's Avatar
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    Re: 86 k10 engine swap

    that could have been it. hopefully you didn't cause too much damage driving it while slipping. next time if OD is slipping put it in D so it won't try to go into OD.

    2004 GMC Sierra SLE Z71 rcsb, 5.3/4L60E/3.73/G80 time bomb...3" lift, tinted 03+ Silverado tails, plasti-dipped 16" wheels (unknown brand), 285/75/16 Thunderer M/T Extremes, Thrush Welded muffler...

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    Re: 86 k10 engine swap

    I told yal wrong it was drive that was slipping not overdrive. Anyway changed fluid and filter last night and went to try it out and the dam electric fan stopped working so it started running hot . By then it was getting dark and i was pissed sat down with a beer and pouted about it . Gonna try to mess with it tonight I guess all the setting that truck did and i am starting to drive it alot all the bugs are waking up . hope this is a simple fix. By tha wat trans fluid taste like s*#t.

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    hucking fates this server FordeatinZ71's Avatar
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    Re: 86 k10 engine swap

    how do you know what $h!t tastes like? just kidding. hopefully fluid was the issue...i know when thr 700R4 gets low enough it will not engage OD, and D will slip. you just need to find out why the fluid leaked out to begin with...

    2004 GMC Sierra SLE Z71 rcsb, 5.3/4L60E/3.73/G80 time bomb...3" lift, tinted 03+ Silverado tails, plasti-dipped 16" wheels (unknown brand), 285/75/16 Thunderer M/T Extremes, Thrush Welded muffler...

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    Re: 86 k10 engine swap

    Got the pan off without a big mess then my 3yr old helper needed my ratchet when i told him to bring it back 2 or 3 drops went in my mouth. Another excuse for a beer break haha. If that electric fan has a bad connection that may have caused that fluid to get hot a time or two . If it is done raining when i get home i'm gonna check all that to worked fine the last two weeks . Like i said i think the germlins are pissed i woke them up.

 

 
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