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Thread: 1981 AMC concord build up 4.7L stroker

  1. #1
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    1981 AMC concord build up 4.7L stroker

    here is my build up , im in the process of restoring my 1981 AMC Concord the car origanally ran the 258 i6 with a carter bbd , i wanted to get away from that motor so i want out and picked a 92 jeep 4.0 engine which is far superior to the 4.2 in performance aswell as reliability,but i wasnt about to just drop in just a plan 4.0 so i went out got a high output head for it head the head port polished cc"d and had a 5 angle valve job done,then i had to move to the lower engine so i got my hands on 258 crank and rods had the crank ground and chamferd and fitted new 0.010" under bearings,had the rods lighned and re sized new ARP bolts fitted, for pistons i used 0.040" over sealed power hyperutectic flat top pistons.i used a comp cams camshaft.I used a mopar performance 0.050" head gasket, as for the timing i used used a cloyes set with three key ways set the timing 5 degrees advanced , for the fuel i wasnt intrested in running the factory fuel injection the 4.0 comes with so i scrapped it and puchased a clifford 6=8 intake manifold that was meant for the 4.2 motor and then plopped a big four barrell 575 holley street avenger on top of it havent completly finished the project yet cant wait to finish motor engine dyno'd 275hp 300 ftb should be intresting in my small little car. any questions on my buld up dont hessitate to ask.

    andy
    Attached Thumbnails Attached Thumbnails andyamc.jpg  
    Last edited by f1andy; 12-03-2009 at 06:37 PM.

  2. #2
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    Sweet . Think that pansy a$$ AMC rear end will handle all that power?
    Commando, Jeepster, Jeepster, AMC Eagle, Commando, Jeepster, another Commando, AMC Eagle, another Jeepster.

  3. #3
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    dont shoot me for asking, but how much did the parts and machining etc cost roughly? I've always wanted to build a stroker
    young kid learnin the hard way
    90 YJ 4.2L, howell TBI, 4L head, 4"lift with 31x11.5s. broke it, welded it, broke around the welds, welded it again, sold it
    99 grand cherokee, 4.7L. 2" BB, 245/75R16

  4. #4
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    here are the rough cost for the work it didn't cost me that much as i have most of the machines need to complete the jobs.hopfully this answers your questions.


    $160 bore and hone
    $120 grind the crank
    $ 160 valve job
    $ 85 deck the block
    $ 65 skim the head
    $ 100 align hone
    $50 rod re sizing
    $ 60 pressing new pistons on
    $100 acid dip and hot tank block and head

  5. #5
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    hey pack rat im acuatlly in the process of rebuilding a 1995 ford explorer posi 8.8 rear for it i do need to figure out what tranny to use.

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    ax15 2wd out of a manchee would be the easyest.

  7. #7
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    Quote Originally Posted by jeepeej21 View Post
    dont shoot me for asking, but how much did the parts and machining etc cost roughly? I've always wanted to build a stroker

    a stroker on a 360 magnum v8 can be 15-3500$ depending on the kit and who you get it from. But as said that's also a kit.

  8. #8
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    ya i didn't use a kit i just put it together piece by piece all together the motor build has cost $2000

  9. #9
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    Quote Originally Posted by f1andy View Post
    hey pack rat im acuatlly in the process of rebuilding a 1995 ford explorer posi 8.8 rear for it i do need to figure out what tranny to use.
    That should be more than adequate . Good transmission guy could build a 904 to handle that or a 727.

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