I think there are some somewhat local places that do porting, with stage II around $500-650. I believe. You could buy the heads and take them there.
Sky
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-1989 Saleen Mustang #406- TFS Heads, E-303, edelbrock intake,70MM TB, 73mm MAF, off road H, headers and 3chamber flows.
12.55@107mph
Going for 11's on 87 octane with A/C and 20+MPG!!!