i am using 1250's on my worked E7's, and there is no way you could remove enough of the port without busting through in numerous points. it is a big a** gasket.
good luck
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90 LX, 4.99/5.10 custom cam, G&M prepped E7's, cobra u/l, 77 mm meter, 70 mm tb, mac longtubes, and h-pipe, crank pulley, cold air, kirban afpr (38), 19lb inj, PI STALLION 2800 stall, 4.10, b&m shiftkit, 26'' slick.
PonyPower
<A HREF="http://www.mustangworks.com/cgi-bin/ViewIt.cgi?http://www.mustangworks.com/cgi-bin/moi-display.cgi?269" TARGET=_blank>1990
Mustang LX</A>