I’ve had both in my 68 dart. This summer I was gonna put a rebuilt 360 into my car. But I just couldn’t do it. It never came with a 360 as an option. So if I decide to go back to small block it will be a 340. Kim
340 or 383 for 1968 Dart
- Thread starter ir3333
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mopowers
Well-Known Member
Probably because you didn't provide that as an option.
matthon
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And the winner is?
And he shouldn’t. A 360 belongs in a truck or a bus. Kim
ir3333
Well-Known Member
i know, but the gen 3 hemi and 440 guys chimed in. As i said they made less than 15,000 in total so to
alter one a lot might not be a good idea... i wouldn't. Still a guy can do whatever he wants to his car...
I thought the 383 option would be preferred because it is so rare?
alter one a lot might not be a good idea... i wouldn't. Still a guy can do whatever he wants to his car...
I thought the 383 option would be preferred because it is so rare?
MILO
Well-Known Member
I took The slant six with 4-Speed and installed a 273 using the 4-speed and it was a fairly easy swap and made a clean runner for me
Nice and clean, 273, the beginning of the LA small block.
I'm sure that's a fun ride with the 4spd.
Jim Lusk
Well-Known Member
Unless it's an original 340 car, big block EVERY TIME. We've done 383 and 440 swaps and have an original 340 car. The 340 is fun, but it doesn't have the torque of the big block.
Swinger 340
Well-Known Member
A agree, if I had a choice between a 340 and 383 I would go with the 440, 340 and 383 in that order. Only because of being unique, I would choose the 440 over the 340. The 340 would be a better handling car, with still a lot of controlled power. No offence to anyone, but I see the 383 as a slug. Only my opinion, never had or drove a 383, but only what I read about it.
a 68 roadrunner 383 in an A-body will walk all over a 68 340 GTS.
I put the drivetrain from a wrecked 68 RR with under 10,000 miles on it in my 67 fastback back in 1977, had that same motor with modifications running mid to high elevens by 1980 in street trim.
Swinger 340
Well-Known Member
Maybe in a striate line. I'm not a BB fan. I drove several and will stick with my SB's.
67Dart340GT
Member
Easy choice for me - a 340 is the only path.
My 67 went the 340/727 route - I like the weight balance and things go in easily when swapping from a 273/904...
I have owned both a 383 and 340 FS FB. The 383 was stock so heavy. Putting 0.94" torsion bars and a 1 1/4" sway bar really changed the handling. Yes, a 383 with AL heads and other low weight parts weighs about what a stock 340 weighs, but a 340 with AL heads, intake and tubular exhaust is nearly the weight of a /6. I actually enjoyed the 383 a lot as it was a 4sp while the 340 was a 727. But the 340 was much faster as the 383 was the 290 HP version. I did update the cam and ported the heads along with unshrouding the intake valve to cylinder wall, but the 383 still wasn't as snappy as the 340.
Unfortunately, I had to sell the 383 and have no idea where it ended up. The next owner sold it to a third-party weeks after buying it.
Unfortunately, I had to sell the 383 and have no idea where it ended up. The next owner sold it to a third-party weeks after buying it.
Swinger 340
Well-Known Member
As you say, "with a few modifications". A stock early 340 with a few modifications will also hit into the 11',s. Intake, carb upgrades and headers is all it would take and the car will handle better getting there. Another factor. I keep hearing the 340's are expensive to build but the fact is rebuilding is only part of the expense. All the externals are much like 273,318 and 360 parts, which are much less expensive than RB or BB items.
5 pages and suggestions all over. Nobody has said R5P7 yet. Small block, huge rpm and power.
Professor Fate
Push the button, Max...
'Nuff said.
67Dart340GT
Member
The 360 is a great option if originality isn't an issue (although you can mask the look of the 360 pretty easily). I swapped a 360 in a 74 Challenger and it runs 13.50's in the quarter, the 340 in the 67 Dart runs 13.70's. The Challenger is heavy (relatively) compared to the Dart - something like 500-600lbs more, but the cubes really help.
Both are very similar in setup in many ways, but the Dart has the weight and gear advantage (Dart has 3.91's - Challenger 3.23's), but the Challenger has more cubes and a more cam, with ported 2.02 heads.
For me it that a 360 never came in my 68 dart so I just can’t bring myself to put 1 in. I have decided to keep the 383 in it. Kim
Now thats a slant!
That's actually showing one side of a V16, but hey we can pretend. LOL
Green Bean
Member
I recently bought a 383 (69 335 HP) 727 auto swapped 68 Valiant so you know where I stand. It already had the Shumacher shorty Tri-Y headers on it easy plug access. I have an aluminum intake, water pump and housing awaiting paint and installation sitting on the floor in the living room. Battery is already in the trunk. I chose the big block because I had never owned a big block before, I was looking for that low end torque. My current dilemma is whether to change out the lumpy cam in the car with a high lift short duration cam that would match the gearing or change the 2.9 rear end for something that matches the existing cam. Fear of bad lifters is a factor.
340six
King Of Bling
Ok. I figured it out. Rear mounted so it would work like a pusher bus.
It's a plan. Did not say it was a good plan.
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