If cam was different, so was springs. Every cam requires a different spring pressure to close it at a certain RPM. I would imagine the 4bbl engine was set up for a different powerband so I would bet springs were different. Solid lifters vs. hyd would also matter.
Donnie----- Original Message ----- From: "Tom Watters" <tomwatters@xxxxxxxxxxx>
To: <1962to1965mopars@xxxxxxxxxx> Sent: Wednesday, February 16, 2011 4:29 PM Subject: Re: Casting #'s for 64 Polara
Were the valve springs different strength between 2bbl and 4bbl? For 273's I know that was the case, but not sure on the B Blocks.On 2/16/2011 1:17 PM, Cory Rempel wrote:The casting numbers I'm not sure of. But the diference between the 2 and 4 barrel engines are carb, intake, and cam. Pretty sure the heads were the same.Cory 65 Polara 440 c.i.To: 1962to1965mopars@xxxxxxxxxx From: Blosserde@xxxxxxx Subject: Casting #'s for 64 Polara Date: Wed, 16 Feb 2011 15:55:21 -0500 The casting number on the engine block of my Polara is 2468130. I think that denotes a 383?Since the casting numbers on the heads appear to be the same for any engine block size, and the intake and exhaust valves specs appear to be the same,is there any way to tell whether the engine was built as a 2 barrel carb motor or a 4 barrel carb motor? Was there any difference in the 383 c.i. motor other than the 2 or 4 bbl carb? Was there a different cam? thanks for any info. David -- [Non-text portions of this message have been removed] ----Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks!1962 to 1965 Mopar Clubhouse Discussion Guidelines:http://www.1962to1965mopar.ornocar.org/mletiq.html and http://www.1962to1965mopar.ornocar.com/general_disclaimer.html.-- [Non-text portions of this message have been removed] ----Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks!1962 to 1965 Mopar Clubhouse Discussion Guidelines:http://www.1962to1965mopar.ornocar.org/mletiq.html and http://www.1962to1965mopar.ornocar.com/general_disclaimer.html.
---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! 1962 to 1965 Mopar Clubhouse Discussion Guidelines:http://www.1962to1965mopar.ornocar.org/mletiq.html and http://www.1962to1965mopar.ornocar.com/general_disclaimer.html.
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