What's the difference?
08-21-2016, 05:57 PM
#1
Racer
Thread Starter
What's the difference?
Can anyone tell me what the differences are between the early 60's
327/340 engine and the mid/late 60's 327/350 engines?
327/340 engine and the mid/late 60's 327/350 engines?
08-21-2016, 06:20 PM
#5
Melting Slicks
Also, the 340 horse had 1.94 intake valves; the 350 horse engines had 2.02s. Carter AFB on the 340hp, and Holley on the 350hp.
Rich
Rich
Last edited by MidShark; 08-21-2016 at 06:21 PM.
08-21-2016, 09:20 PM
#6
Melting Slicks
Member Since: Feb 2011
Location: Middletown Ohio
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The 340 HP engines were solid lifters, 11.25 CR (roughly) and used a AFB carb, 2 1/2 " exhaust manifolds and a centrifugal advance distributor.
The 327 350 HP engines had hydraulic lifters, ??? CR, Holley Carb and I believe a vacuum advance dist. In my opinion the one in my 67 ran extremely well, as does the 340 HP engines like the one in my 62.
The 327 350 HP engines had hydraulic lifters, ??? CR, Holley Carb and I believe a vacuum advance dist. In my opinion the one in my 67 ran extremely well, as does the 340 HP engines like the one in my 62.
08-21-2016, 10:25 PM
#7
Racer
Thread Starter
The 340 HP engines were solid lifters, 11.25 CR (roughly) and used a AFB carb, 2 1/2 " exhaust manifolds and a centrifugal advance distributor.
The 327 350 HP engines had hydraulic lifters, ??? CR, Holley Carb and I believe a vacuum advance dist. In my opinion the one in my 67 ran extremely well, as does the 340 HP engines like the one in my 62.
The 327 350 HP engines had hydraulic lifters, ??? CR, Holley Carb and I believe a vacuum advance dist. In my opinion the one in my 67 ran extremely well, as does the 340 HP engines like the one in my 62.
08-21-2016, 10:46 PM
#8
Race Director
The 327 350 HP engines had hydraulic lifters, ??? CR, Holley Carb and I believe a vacuum advance dist. In my opinion the one in my 67 ran extremely well, as does the 340 HP engines like the one in my 62.
Personally I think the 65-68 327/350 was the best all around small block ever made.
Last edited by gbvette62; 08-21-2016 at 10:47 PM.
08-21-2016, 10:49 PM
#9
Team Owner
08-21-2016, 10:56 PM
#10
Melting Slicks
Member Since: Feb 2011
Location: Middletown Ohio
Posts: 2,892
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2016 C1 of Year Finalist
The 62 340 didn't have vacuum advance, but the 63 340 does.
The compression ratio for the 65-67 327/350 was 11.00:1. The 65 350 HP used 2 1/2" exhaust manifolds, like the 62-63 340, while the 66-68 327/350 used 2" manifolds.
Personally I think the 65-68 327/350 was the best all around small block ever made.
The compression ratio for the 65-67 327/350 was 11.00:1. The 65 350 HP used 2 1/2" exhaust manifolds, like the 62-63 340, while the 66-68 327/350 used 2" manifolds.
Personally I think the 65-68 327/350 was the best all around small block ever made.
And the hydraulic lifters were a great improvement over the solid lifters but I did miss the mechanical engine sound.
Bruce B
08-22-2016, 01:55 PM
#11
Racer
Thread Starter
Could you get a 327/340 in an Impala (62/63)?
If you could, would the valve covers be aluminum finned like the Corvette?
I'm guessing the 327/340 had a Winters aluminum intake....right?
If you could, would the valve covers be aluminum finned like the Corvette?
I'm guessing the 327/340 had a Winters aluminum intake....right?
08-22-2016, 03:47 PM
#12
Race Director
62 & 63 Nova/Chevy II's were only offered with a 6cyl. For 64, a 283 was added to the Nova as an available option, with the 327/250 & 300 joining the Nova line up in 65. The 327/350 was offered in the 66 Nova, and a slightly detuned 325 horse version could be had in 67's.
The new for 64 Chevelle was offered with the 327/250 & 300. There was Chevrolet material from the time listing the 327/365 as an option too, but there doesn't seem to be any proof that any where actually built. For 65, the 327/350 was offered in the Chevelle and El Camino, but after the 396 came out, the top 327 available for 66 was the 275 HP version.
Since no 327/340's were ever installed in anything other than Corvettes, only the Corvettes got the finned aluminum covers. The L-79 in Nova's and Chevelle's, came with chrome plated versions of the stock stamped steel valve covers.
All small blocks with ratings over 300 horse power, came with an aluminum intake. The only exception to this was the 68 327/350 and 69-70 350/350, which used cast iron intakes.
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