How streetable is this 1970 Duster?

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Yunick13 said:
Surprised no one mentioned the possibility of a 5 spd trans.
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this set up needs rpm to run. that cam doesn't even get out of bed until 3500 so all adding a gear will do is drop rpm at the expense of everything else-- power, economy and most important drivability.
 

I’ll speak to the Efi… that wiring is a mess and a hot bed for EMI. And with the specs of this thing…. Unless it’s got a damn good tune from a pro tuner… you’re gonna hate driving it with the Efi.

That and a few other things have me passing on this car for an around town car.
 
cli55er said:
I’ll speak to the Efi… that wiring is a mess and a hot bed for EMI. And with the specs of this thing…. Unless it’s got a damn good tune from a pro tuner… you’re gonna hate driving it with the Efi.

That and a few other things have me passing on this car for an around town car.
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1000%

The added EFI could very well be an attempt to tame it down and make it more drivable.

Lot of non mechanical people put them on for band aids. You can spend a lot of time and money sorting one out when there are other root cause issues you don’t know about.
 
I drove a 1971 Duster 340 with a turbo action reverse pattern valve body and one of their 3500 stall speed converters with 4.30 gears as my daily driver for a couple of years. Ported and polished TA heads, M1 Intake, 950 CFM Barry Grant Carb stage 3 (reworked Holley 750 DP). I had 10.5:1 compression and that same cam. The drive from my house to my business was only about 3 miles each way through traffic, so the 4.30 gears were not an issue. Now driving that car on the highway was 3500 RPM's + all the time, the power steering fluid would boil if you drove it too long on the highway and your power steering would stop working, besides that you could drive it on the highway with a ton of noise coming through the Flowmaster mufflers. This was when I was in my 20's and such a thing was tolerable, now a days I would not run a combination like that as a daily driver, for weekend use it would be fine.
 
That 508 cam should have enough duration to bleed off some cylinder pressure which will help with pump gas.
Aluminum heads or cast iron ?
 
I'm running that cam in my 1969 340 Dart with a four speed and 4.10 gears and it works fine for street driving in my opinion. For what you say you're planned use is, I think it would be great.
 
MOPARMAGA said:
That 508 cam should have enough duration to bleed off some cylinder pressure which will help with pump gas.
Aluminum heads or cast iron ?
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what happens when the cylinder pressure catches up in the higher RPM range. That's when detonation you can't hear happens. btdt
 
With a crap Efi tune you’ll be detonating all day long….. pass.
 
BrianT said:
The original poster hasn't been back for a week and both ads are down. He must be busy out driving?
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Naw.. he's still looking.. was just talking to him about it.. I looked at the ontario car market and man it's BAD..... anything barely decent is 25-30k.. He probably shoulda grabbed the one posted here... coulda put leaf springs back in it for like $400 if the ladders were an issue. Time to keep hunting.
 
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