Depending on how much power you are planing on putting through the transmission with your 440, you may want to consider a well-built 4L60. I'm putting a supercharged 408 Magnum that should be close to 730 rear wheel horsepower in my '68 A-Body, and am planning on up-sizing my transmission to a re-geared 4L60 with a bolt on bellhousing. There is a bolt-on bellhousing available for a big block conversion too. Nice thing is the 4L60 is fully programmable with the Holley Terminator Max ECU including traction control.
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