Fav drivetrain in my '66 GTO: 428 with 72cc E-heads, solid roller (250-ish at .050, 114), 200-4R and 3.73 12-bolt and port EFI to make it streetable.
What I like about the 428 is more torque than a 400, but not so much that it overwhelms street tires (ones that handle corners well), but has that lovely high-RPM rip with good horsepower. Even with less torque than a bigger motor, it will still do wheelspin at 55 mph if you stand on it in 2nd.
One of these days I'll install a TKX... my "low" torque, high-RPM engine should be a natural for this trans.
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