"... proper port and bolt alignment with the heads."
Presume you mean Edelbrock cylinder heads. In the 1999 Edelbrock instruction sheet it states their Performer RPM cylinder heads are matched in size and operating range with the Edelbrock Performer RPM intake manifold.
I've noted milling the intake in conjunction with their cylinder heads modified with taller ports.
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 )
Old information here:
http://www.hotrod.com/articles/0712p...tiac-trans-am/
Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine)
5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension
https://www.youtube.com/watch?v=qDoJnIP3HgE
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