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James 06-12-2009 03:30 PM

BBC Aluminum vs Iron Head Question
Just curious on the average what is the wieght savings between a set of BBC aluminum heads vs a set of BBC iron heads? While I have the 509 out of my 69 I was thinking about replacing the cast iron Merlin II rectangle port heads with a set of Merlin III aluminum heads. Just was wondering how much wieght that would knock off the front end?

Little Mouse 06-12-2009 04:53 PM

Fully assembled iron 308 rectangle port, 70 lbs X 2 = 140
Fully assembled 308 pro 1 aluminum, 29 lbs X 2 = 58 lbs

This is just looking at what dart shows on there web site as weight
for there heads.

Ganey 06-12-2009 05:09 PM

About 75.

Ironcross 06-12-2009 06:32 PM

actually you will save 70 lbs off the front end....fully dressed from iron to aluminum.

427Hotrod 06-12-2009 07:10 PM

And if you're buying heads....I'd pick a better set. You can easily beat the Merlin's these days.


baxsom 06-12-2009 10:23 PM

look at it this way. i replaced the iron heads with al on my 454.
i had to get help lifting them up off of the car.
the al ones i could lift onto the block with one hand

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