Roller Rocker question
Senior User
Joined: Feb 2005
Posts: 234
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From: Vancouver, Canada
they are for my 351. I cant find any gt-40s up here in vancouver, so i found a buddy who has a set hi po 69 heads. they are far better than the heads I have on my truck now. 60cc chamber vs 67-70cc on my e5 heads and bigger valves. I was just worried about maybe these older heads were only usable on the first generation 351 with the shorter deck height.
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Mountain Pass
Joined: May 2009
Posts: 137
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Both pressed in studs and pedistal mounted rockers are more than capable of dealing with the relatively mild stock valve springs and camshafts. It's only when you get into high lift cams with stiffer springs and you start reving the motor beyond 5000rpm that screw in studs become necessary.
And i already rev the motor past 5000
Postmaster
Joined: Jan 2009
Posts: 4,558
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they are for my 351. I cant find any gt-40s up here in vancouver, so i found a buddy who has a set hi po 69 heads. they are far better than the heads I have on my truck now. 60cc chamber vs 67-70cc on my e5 heads and bigger valves. I was just worried about maybe these older heads were only usable on the first generation 351 with the shorter deck height.
Postmaster
Joined: Jan 2009
Posts: 4,558
Likes: 2
The mustangs have pedestal mount rockers & are fine to 6000 rpm , if you have press in i would drill & tap for screw in studs ....
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