'Match Race 1969' 440 'Cuda vs 440 'Six-Barrel' Road Runner

Generally Speaking,

For 1969 B-Body Performance Cars, when using the the 383 Car as the 'base weight'.

The 440 Car with an 8 3/4" Rear-End was approximately +85 lbs. heavier.

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Weight Numbers

The 440 Engine {670 lbs.} weighs {+50 lbs.} heavier than the 383 Engine {620 lbs.}

The Dana 9 1/4" Rear-End weighs {+53 lbs.} heavier than the 8 3/4" Rear-End.
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Also, the 1969 Road Runner 440 'Six-Barrel' had some additional 'Heavy-Duty' Suspension
components.
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Note; {From the Factory}

Though they were never produced, a 'bare bones' 1969 Road Runner 'Coupe' with a 440 'Super Commando'
and an 8 3/4" Rear-End would weigh in at approximately #3522 lbs. {less any Bells and Whistles}.

Now, add in the 9 1/4" Dana Rear-End, and upgraded 'suspension components', and the Road Runner
would come in at #3621 lbs.

Remove the 'steel' Hood and Hood Hinge Assembly Units, and replace them with a Fiberglass Hood, and
you save {66 lbs.}.

Replace the 'cast iron' Intake with an 'Aluminum Intake' and you save another {20 lbs.}.

#3621 lbs. - #86 lbs. = #3535 lbs.

That is the 1969 Road Runner 'A12' 440 Six-Barrel.