Edelbrock gasket information here:
https://edelbrock-instructions-v1.s3...rock/61595.pdf
According to Edelbrock the as cast Performer RPM intake port exit dimensions are 1.100" x 2.060"
I've always been under the assumption the FelPro 1233 gasket is about 1.180" x 2.200"
Might be of interest:
https://www.youtube.com/watch?v=izhxm2vk6Jo
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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)
Best time 5.13 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension
https://www.youtube.com/watch?v=qDoJnIP3HgE