What's the exact difference........
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Junior User
Joined: Sep 2010
Posts: 97
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What's the exact difference........
Between the 351C 4v closed chamber head found on the Boss and the standard 351C 4v closed chamber head?
Wikipedia says
The cylinder head was modified for better airflow and solid lifters.
Any more specifics?
Wikipedia says
The cylinder head was modified for better airflow and solid lifters.
Any more specifics?
Laughing Gas
Joined: Jan 2006
Posts: 883
Likes: 7
From: New-brunswick,Canada
351C-4v 70-71 DOAE-H,R 62.8cc larger valves and porting than 2v head for increased flow.
351C Boss 71 D1ZE-B 66.1cc adjustable rocker arm with guide plate.
351C HO 72 D2ZE-A 75.4 HO used open-type combustion chamber , other wise same as 71 Boss.
According to my rebuild book.
I'm just guessing but for better flow maybe they open the chamber by 3.3cc ???
351C Boss 71 D1ZE-B 66.1cc adjustable rocker arm with guide plate.
351C HO 72 D2ZE-A 75.4 HO used open-type combustion chamber , other wise same as 71 Boss.
According to my rebuild book.
I'm just guessing but for better flow maybe they open the chamber by 3.3cc ???
Lead Driver
Joined: Mar 2004
Posts: 8,924
Likes: 153
The boss heads are machined for spring seat cups and an adjustable valve train.
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