I ran an 11.384 n/a with a ported Cobra. I had the EGR ported out and the opening bored to 75mm. Lower was gasket matched to a 1262 Fel Pro.
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88 347, Twisted wedge heads,Comp Cams 224/230 cam, 1/4=10.718 @ 123.02 mph,dyno=
=http://www.fbody.com/members/LarryS/mustdyno.jpg