#3991492 angle plug heads-questions ? ? ?
Thread Starter
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
#3991492 angle plug heads-questions ? ? ?
I always thought they were strictly over the counter items and never came on a car ???
Some have told me they only came bare ???
I've also been told there was a long block assembly offered with these heads ???
I was also told they were good for 35 HP ???
Anyone know the truth ???
Thanks
Some have told me they only came bare ???
I've also been told there was a long block assembly offered with these heads ???
I was also told they were good for 35 HP ???
Anyone know the truth ???
Thanks
Pro
Joined: Sep 2010
Posts: 745
Likes: 66
From: Hutto Texas
Below is a piece from the posting below. Looks like it answers your question.
http://www.jalopyjournal.com/forum/s...d.php?t=457523
"The angle plug 492's were never production heads. They were an over the counter head that used the same ports as the straight plug 492's (which were production heads). They were pre 292 Turbos, which were completely redesigned."
http://www.jalopyjournal.com/forum/s...d.php?t=457523
"The angle plug 492's were never production heads. They were an over the counter head that used the same ports as the straight plug 492's (which were production heads). They were pre 292 Turbos, which were completely redesigned."
Burning Brakes
Joined: May 2008
Posts: 860
Likes: 0
From: Stratford Ontario
There was two versions of them some came on vettes,etc. I cant remember the #'s but the over the counter heads had one less # in casting. The over the counter ones were faulsy refered to as turbo heads.
Melting Slicks
Joined: Oct 2002
Posts: 2,317
Likes: 111
From: St Louis MO
Bought a bare set from Chevy over the counter in 1972 with the angle plug option. These 492 heads measured at 162 cc intake runner and 64 cc chambers with 2.02/1.60 valves; the heads also have an open heat riser passage from one of the inner exhaust runners to the center opening in the intake manifold (which I blocked off).
They are very good heads for 327/350s, but with porting, I used it well on a 406. However, when I replaced them with AFR 210s, the HP increased by about 50!
They are very good heads for 327/350s, but with porting, I used it well on a 406. However, when I replaced them with AFR 210s, the HP increased by about 50!
