Re: Any hope for good power 73 340 -
[Re: AverageJoe]
#741666
07/06/10 12:33 PM
07/06/10 12:33 PM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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Quote:
It is the original motor (95,000 miles). I know these years don't command the prices other years do (yet?), but I like the 73/4 for some reason over the 71/2. Anyway, thanks for the response - and as I said, I do have a 440 nd trans as well. Didn't know if going the big block swap would be worthwhile for what I'm looking for. At least with the 360 I could keep it looking original. Dunno.
what's your budget? I'd personally keep it small block. if you're on a budget, I'd pack the 340 away, pick up a magnum 360, rebuild that with KB107 pistons, some prepped RHS heads from brian at IMM (magnum style redrilled to LA bolt pattern to use cheaper SBC rockers) and a roller cam using stock magnum lifters, and for rockers, probably some Scorpion Performance SBC 1.5 ratio rockers (1.6's might get unstable at high RPM with such a heavy lifter and aggressive lobes). for an off the shelf cam, I'd look at a comp XR268HR-10, run an eddie RPM air gap, LD340, or RPM, headers, and a 750-800cfm carb...should make ~400-410 HP and probably 440 lb ft of torque, and be ~ $3500 to build...
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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Re: Any hope for good power 73 340 -
[Re: DaytonaTurbo]
#741669
07/06/10 03:26 PM
07/06/10 03:26 PM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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Quote:
I don't think I'd want anything but a big block under the hood of mine. Everything fits quite well and it's just at home there. But then mine was an original 318 satellite, nothing is #'s matching now and nobody is going to cry over anything I do to this car. With yours being an original 340 car, I would be tempted to take the 340 and stroke it to a 416, put a set of headers and a 6-pack on it. Would make for a sweet ride and I think give you the power you are looking for. I would likely not pull the original 340 just to sit on it. You do that and that 340 will never make it back into that car. These cars, even your #'s matching 340 car do not command the value of the older ones and they never will. At least if you rebuild it into a stroker the orignal block will make it back under the hood and you can build it for a lot of power yet look pretty stock-ish from the outside. 
good points....if you wanted to keep the original 340 block, I'd still go the RHS heads, etc, and I'd personally run a hydraulic roller or maybe a small solid roller with some less aggressive lobes to get some longevity out of the valvetrain....for sheer power, a 4" stroke crank, with some dished pistons and the RHS heads to get compression ~10-10.5:1 would still be pump gas friendly with a roller cam in the 224-230@.050 range and work well with the 3.23's...on a budget, I'd go KB flat tops and the stock crank, should still be able to get ~10:1 with that combo and RHS heads....I'd still buck up for a roller cam, but probably stay in the 215-218@.050 range...
another option, is to contact some of the builders, brian at IMM had a 4" stroke/RHS head flat tappet hydraulic combo that was about $5k intake to pan that pushed his duster to the low 11's (search the race forum), and Jesse Lackman had a hydraulic roller combo using old RHS magnum heads that made
520HP/540tq
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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Re: Any hope for good power 73 340 -
[Re: patrick]
#741670
07/06/10 03:52 PM
07/06/10 03:52 PM
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Joined: Jan 2003
Posts: 1,481
Outside
thedriver
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,481
Outside
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i think you would be ahead power to dollar ratio wize, putting the 440 into the car. theres some good suggestions here by way of, 4"crank, better heads, etc, etc, in the end, yer lookin at a 500hp small block. spend the same amount on yer 440 and tell me what kind of power/driveability you will have! 
1973 challenger
Dana. 4 speed. Low deck.
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Re: Any hope for good power 73 340 -
[Re: thedriver]
#741671
07/06/10 04:20 PM
07/06/10 04:20 PM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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also, it depends on what you mean by gutless.... heck, the 318 I have in my 5th ave pushes it around quite good, my guess is mid 14's--it keeps up with a stock AWD 300C from a roll. not bad considering it was 3950 lbs when I had it on a scale. it's a stock short block, magnum heads, RPM air gap, 600 eddie carb, 1 5/8" headers, and a reground roller cam that is 259/259 adv, 208/208@.050, 127/127@.2", .316" lobe lift. it's in front of an A500 and 3.55's with 27" tall tires. there's a number of dakota guys running stock long block 5.2's well into the 13's with cams under 220@.050....and daks usually run in the 3200-3800lb range...
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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Re: Any hope for good power 73 340 -
[Re: MNobody]
#741675
07/07/10 05:12 AM
07/07/10 05:12 AM
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Joined: Jun 2008
Posts: 10,847
Oakdale CT
gdonovan
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I Live Here
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Posts: 10,847
Oakdale CT
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Quote:
With that heavy of a car i'd go the 440 route.
Surprised no one has mentioned a stock 360 magnum motor or a 408 stroker kit.
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Re: Any hope for good power 73 340 -
[Re: Paul_Fancsali]
#741677
07/07/10 01:39 PM
07/07/10 01:39 PM
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Joined: Jan 2003
Posts: 543
Indiana, Just Off I-70
BradD
mopar
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mopar
Joined: Jan 2003
Posts: 543
Indiana, Just Off I-70
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 How hard are you going to push it? I would rebuild the 340 with more compression and more cam. it will get decent mileage, have good power, and wont cost alot. I've been a 340 fan since the 70's. Brad Dorn Autocraft
Check out the Dorn's 69 Barracuda "Switchblade" in the Nov.2010 MCG
Check out the Dorn's refurbished 36 Ford in the Feb.2011 Street Rodder
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Re: Any hope for good power 73 340 -
[Re: gdonovan]
#741678
07/07/10 05:17 PM
07/07/10 05:17 PM
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Joined: Feb 2005
Posts: 4,884
Michigan
MNobody
master
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master
Joined: Feb 2005
Posts: 4,884
Michigan
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Quote:
Quote:
With that heavy of a car i'd go the 440 route.
Surprised no one has mentioned a stock 360 magnum motor or a 408 stroker kit.
I was gonna say stroke the 340, i'm doing a 408 for my 68 Dart but thats a light car. The low end torque of the 440 would shine in that heavy car and i'm betting the parts would be cheaper than the 340.
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