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Forum: 70-73 Firebird & TA TECH 12-10-2022, 05:46 PM
Replies: 14
Views: 1,003
Posted By Brewster G
unruhjonny - Thank you, that is just the kind of...

unruhjonny - Thank you, that is just the kind of insight I was initially looking for. I too have now come to the conclusion that these were not the original heads and as you say they were most likey...
Forum: 70-73 Firebird & TA TECH 12-10-2022, 02:15 PM
Replies: 14
Views: 1,003
Posted By Brewster G
I would be aiming for at least 10:1 comp on iron...

I would be aiming for at least 10:1 comp on iron heads, hence why I was asking how much the 98cc heads can be skimmed down.

If its not feasble to acheive this compression with these heads I will...
Forum: 70-73 Firebird & TA TECH 12-09-2022, 01:56 PM
Replies: 14
Views: 1,003
Posted By Brewster G
Thanks again for all the info and links. I pulled...

Thanks again for all the info and links. I pulled a valve cover and found screw in rocker studs so I everything seems to tally with the various sources for 98cc's.

Now I just need to find a copy...
Forum: 70-73 Firebird & TA TECH 12-06-2022, 04:14 PM
Replies: 14
Views: 1,003
Posted By Brewster G
Hi guys, Many thanks for your replies. I...

Hi guys,

Many thanks for your replies. I have been basing my assumptions that a secondary stamping of 3 is a 98cc head from a 400 4bbl MT on the following: http://pontiacpower.org/4xheads.htm
...
Forum: 70-73 Firebird & TA TECH 12-05-2022, 03:43 PM
Replies: 14
Views: 1,003
Posted By Brewster G
73 4X head identification

My early 73 T/A 455 has 4X heads dated H182. Yes and? I hear you ask.

Well up to press (I have owned the bird about a year) I had assumed these to be the original large chamber 455 application...
Showing results 1 to 5 of 5

 
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