AMC. Possiable 340 swap?
#983602
05/01/11 12:49 AM
05/01/11 12:49 AM
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V194
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While it may be possible is it easy or relatively painless? Found a cheap small 70's AMC Hornet with a 6 and thought a 340 might be a nice swap. Any experience on this? Links? (haven't found a reasonably priced a body in 10 years that is not across the country. )
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Re: AMC. Possible 340 swap?
[Re: NV69B7RR]
#983609
05/01/11 06:36 PM
05/01/11 06:36 PM
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V194
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You'll have to fab motor mounts, but the trans mount should be a bolt in since they used 727's. As mentioned above the oil pan will be the most critical part. I have a 68 AMX so if you need any measurements PM me. Try asking over on http://theamcforum.com/forum/
Although I'll warn you that they are more anal about non amc engine swaps then non mopar engine swaps on here.
I was reading a swap post on some AMC Jeep forum of some guy who wanted to swap a 350 chevy into the Jeep and they did give him a hard time so I know what they will object to. Honestly i like to keep the engine swaps within each make Ford=Ford, Chevy = Chevy and so on. But with already having one component or another it is wasteful to not to explore the opportunities.
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Re: AMC. Possible 340 swap?
[Re: Neil]
#983612
05/01/11 10:12 PM
05/01/11 10:12 PM
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Posts: 4,872 connecticut
pnypwr
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I put a 360 mopar ina gremlin, which is the same underhood as a hornet...your biggest obstacles will be oil pan, amc is rear sump mopar is front so you will need a truck pan, you will have to clearance said pan to clear the steering drag link. motor mounts mopar is alot further forward than amc. headers...the left side is tricky there will be fabrication there..right side bolts in with some clearanceing of the strut rod mount. Amc goes rearward as mopar goes forward. and the big one is the distributor..mopar is in the back amc is in the front...not a big deal you would think except you cant have the wiper motor anymore and need to clearance the cowl...the car I was building was going to be race only so that didnt matter.
if you deceide to go amc v8 power, the engine crossmember is different, you will need the small body motor plates, amx jav or rebel wont work. 360s are very plentiful, 304 arent real hard to find, 390 and 401 get pricey quick. also the early amcs pre 72ish used a borg warner trans so the crank pilot is smaller and a torquflite wont work. however you can bolt an amc mount to a 904 and retain your stock driveshaft and shifter linkage...
im currently converting my gremlin x to amc v8 power it was orig a 6 cyl, you will also prob want to do something with the model 15 rear behind a v8 with power it will be shortlived, and dont forget about the huge 9 in drums that the 6 popper had...luckily discs are pretty easy to find off a spirit or concord...and if you want an amc rear the model 20 isnt too hard to find.
"Are you gonna bark all day lil doggy? Or are you gonna bite?"
05 ram 2500 ctd 74 gremlin x 360 65 mustang 347 70 coronet R/T 440 03 Mach 1
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Re: AMC. Possible 340 swap?
[Re: V194]
#983614
05/02/11 04:21 AM
05/02/11 04:21 AM
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Joined: Feb 2003
Posts: 4,833 Castlegar, BC, Canada
That AMC Guy
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Quote:
Great info! Thanks Just to clairfy for me. If the hornet is originally a 6 what has to be done to convert to AMC V8?
At the very least you'll need a Chrysler tranny and a beefier rear end. The six rear is the AMC model 15 which only has a 7 9/16" ring gear. Pretty easy to shred.
Also, front coil springs won't be up to the task of supporting the weight of a V8. I mean, you CAN run the springs, but they'll compress more than usual and handling will be effected.
You're lucky with the Mopar small block as they have the fuel pump on the same side as the AMC six. Also, if it's a '70 model Hornet, you're in luck AGAIN as the AMC Six and SB V8 share the same starter location. If you plan on power steering though, you'll need to extend wiring for the alternator. Early AMC sixes mount the alt on the Driver side. SB V8 has it on passenger side.
Other than that, as has been mentioned you'll need a rear-sump truck pan as AMC's are rear sump because of the location of the steering arms.
Find a 904 or 727 that'll mate to the SB. AMC tranny's in '70 are Borg-Warner sourced. AMC Torqueflites DO NOT share bolt pattern with Mopars.
I've been told the Ford Explorer 8.8 rear is the perfect width for the AMC small body. Some re-welding of the spring perches is necessary. But if you're good at fabricating, stuff a Ford 9" or a Mopar 8 3/4 and not worry about the sometimes problematic AMC diffs.
Bloody Mary, Full of Vodka, Blessed art thou among cocktails....
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Re: AMC. Possiable 340 swap?
[Re: Mr.Yuck]
#983617
05/02/11 10:09 AM
05/02/11 10:09 AM
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Quote:
why not just do a AMC V8?
Why? Because I have a built 340 sitting right here and I have no AMC engine.
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Re: AMC. Possiable 340 swap?
[Re: dustergirl340]
#983619
05/02/11 10:27 AM
05/02/11 10:27 AM
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Joined: Jan 2003
Posts: 24,562 Brookeville, Md
Mr.Yuck
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Not enough dumb comments...yet
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Brookeville, Md
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Quote:
don't worry about him, he hates 340s with a passion, lol.
340's are fine in a small car. I liked my 340 swinger. Should be able to make it fit. How much biggger was the AMC 390?
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