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Forum: 77-81 Firebird & Trans Am TECH 01-30-2008, 04:56 PM
Replies: 18
Views: 1,378
Posted By Daveszcz
I was one of those people looking for a PWH...

I was one of those people looking for a PWH engine mine was trashed in my 79 Y84/W72 I found one on ebay complete minus carb and exh manifolds for 255.00.

I'm also wondering why is this? " the...
Forum: 77-81 Firebird & Trans Am TECH 06-07-2007, 11:14 AM
Replies: 8
Views: 586
Posted By Daveszcz
The XX means it's a W72 / TA 6.6 Block. The 78...

The XX means it's a W72 / TA 6.6 Block. The 78 and 79 TA 6.6 blocks had the XX code I have read it is a thicker web block but I really couldn't say but it was the end of the run for the 400

...
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