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Author Topic: AMC-258 I6 to AMC-290 V8  (Read 6873 times)

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Offline 68AMXGOPAC

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Re: AMC-258 I6 to AMC-290 V8
« Reply #15 on: June 06, 2011, 09:20:28 AM »
Yeah, some places it is tough to get parts unless you know all the hoarders in your area,lol. I paid $750 for a 390 for my AMX , it is an original 390 GoPac auto with air, the motor was nothing but a block, crank and a couple buckets of the rest on the internals.The 401 I am building is just about done and I have over $2000 in it.Then again seeing what they bring on fleebay , not a bad deal : ).
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1968 AMX GOPAC 390/4SPD.
1984 Eagle Wagon I6 258 auto
1983 Eagle Wagon I6 258 EFI convert ( Caroline)
1995 Cadillac Seville STS Norstar 32V 310 H.P. V8
1995 Cadillac Eldorado ETC Norstar 32V 310 H.P. V8
Money Pit ll - 82 SX/4 Sport
1995 Triumph Speed Triple
1969 Honda CB350 - custom project

Offline SX/290

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Re: AMC-258 I6 to AMC-290 V8
« Reply #16 on: June 06, 2011, 11:23:29 AM »
Yep, My friend I bought the Eagle from has a stock pile of AMC's and 360,390, and 401 engine parts . . .

Mike
1953 Studebaker M275.
1962 GMC 4500.
1969 AMC AMX-390.
1982 AM-Jeep J-5500.
1982 AMC Eagle SX/290.
1988 AM-Jeep MJ-343.
1992 GTA trans AM.
2007 Honda Rubicon ATV.

Offline priya

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Re: AMC-258 I6 to AMC-290 V8
« Reply #17 on: June 06, 2011, 11:35:46 AM »
Sounds like a pretty good plan - I like it.  290 will give you more power, but not so much more as to be a problem for the drivetrain and still get pretty good fuel economy.  Little AMC V8 in an SX/4 would be pretty sweet. 

Offline SX/290

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Re: AMC-258 I6 to AMC-290 V8
« Reply #18 on: June 06, 2011, 11:40:54 AM »
Yep I like my plan, AMC-290 / T5 / 3.73s.

Seems like a nice combo to me ;)

Mike
1953 Studebaker M275.
1962 GMC 4500.
1969 AMC AMX-390.
1982 AM-Jeep J-5500.
1982 AMC Eagle SX/290.
1988 AM-Jeep MJ-343.
1992 GTA trans AM.
2007 Honda Rubicon ATV.

Offline Sunny

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Re: AMC-258 I6 to AMC-290 V8
« Reply #19 on: June 06, 2011, 12:01:47 PM »
Yep I like my plan, AMC-290 / T5 / 3.73s.

Seems like a nice combo to me ;)

Mike

That's how AMC should have built them.. Decent combo for sure.

Offline SX/290

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Re: AMC-258 I6 to AMC-290 V8
« Reply #20 on: June 06, 2011, 12:20:24 PM »
I'm doing a basic rebuild, upping the compression to 10.3:1, Then swapping on a 4bbl intake from a 390.

I figured a 450-600cfm 4bbl carb oughta work.

Mike
1953 Studebaker M275.
1962 GMC 4500.
1969 AMC AMX-390.
1982 AM-Jeep J-5500.
1982 AMC Eagle SX/290.
1988 AM-Jeep MJ-343.
1992 GTA trans AM.
2007 Honda Rubicon ATV.

Offline hypereagle

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Re: AMC-258 I6 to AMC-290 V8
« Reply #21 on: June 08, 2011, 08:34:19 PM »
Sounds like a fun project. 290 4Bbl. is also pretty rare. Hope you are going to a standard trans. All AMC engines up to 1973 where they start using Chrsler transmissions have a different crank flange.
 The crank flanges were changed to accept a modern style torque convert support/snub. unless you get machine work done to the flange you will not be able mate later date transmissions to work with eaqrlier engines (1971) down.
However it is possible to bolt up an earlier engine to a later built transmission as all you need is a longer the normal pilot bearing.
You can check out my mounts towards the end of the Eaglenest forum under members products.
Like to see some pics on your 343 Comanchee. My fav motor.
  Feel free to give me a call if you feel the need for V8 Eagle info. 1 780 464 4907  ask for Terry-----Sucks Boston just scored again.
73 AMX/Javelin, 79 Spirit, 81 SX4, 87 Comanche, 02 Grand Cherokee Ltd, 86 2dr Cherokee, 70 AMX 390 4 Spd.

Offline SX/290

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Re: AMC-258 I6 to AMC-290 V8
« Reply #22 on: June 08, 2011, 11:59:49 PM »
Yes i am going with a 290 / T5 combo, backed up with some 3.73 gears :o The majority of my sig is under construction or still in parts collecting and planning stages  :'(

Project SX/290 is going first, Then my 62' GMC, then MJ-343, and then the Studebaker M275 and AMX get worked here there as parts come about . . . their kind of the "I need a break" projects ;D

The Comanche is my daily driver currently a 2.5 / AX4 4spd / D35x3.73s . . . Wanted it to hit 200K miles its at 199K so then this fall it gets pulled from the road and added to my list to be built.

I have a few procjects cause i wanted to have my collection set into place then built as i age so when im to old to build i can just drive my creations  ;D Tis why i am tackling so many at once  ;)

I found out im going to be a daddy :o  :'(  :hello2: So i gotta get my tail in gear  8)
Mike
1953 Studebaker M275.
1962 GMC 4500.
1969 AMC AMX-390.
1982 AM-Jeep J-5500.
1982 AMC Eagle SX/290.
1988 AM-Jeep MJ-343.
1992 GTA trans AM.
2007 Honda Rubicon ATV.

Offline hypereagle

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Re: AMC-258 I6 to AMC-290 V8
« Reply #23 on: June 09, 2011, 09:39:41 PM »
Hear ya on the age thing. Wanting all my toys going but zero ambition. Just enough ambition to drive  what is going.
73 AMX/Javelin, 79 Spirit, 81 SX4, 87 Comanche, 02 Grand Cherokee Ltd, 86 2dr Cherokee, 70 AMX 390 4 Spd.

Offline SX/290

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Re: AMC-258 I6 to AMC-290 V8
« Reply #24 on: June 09, 2011, 10:20:50 PM »
I basically want the 53' Stude M275er - 88' AMC/Jeep MJ painted n polished and turn key by age 45-ish, the GTA and ATV might/may go away at some point here then i find a nice beater/driver the other 6 will be the "toys" some play some work some do both ;D

The Studebaker isn't a bubbled fendered sedan or pickup, Its 2.5T 6x6 Short wheel base truck tractor so ya could say its a flat fendered 10WD ;)

Mike
1953 Studebaker M275.
1962 GMC 4500.
1969 AMC AMX-390.
1982 AM-Jeep J-5500.
1982 AMC Eagle SX/290.
1988 AM-Jeep MJ-343.
1992 GTA trans AM.
2007 Honda Rubicon ATV.