I ported and polished my 289 heads. There once was a great site someone made that ported and polished his 305 heads and thats where I got the idea for mine, but unfortunitly now its unavailable. All I used was simply a Dremal tool with a few different types of bits. Take out the valves and everything of course, and then grind away all the black carbon build-up, then you use a smoother type of bit for the actual metal, not a bit that will leave little lines from the type of material its made of. This will take some time as some of the places are hard to reach (I used sand paper for those places), I have yet to see the results, everything is back in the car and I hope to start it up tomorrow :). Hope this helps.
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-Dani Benedek-
1981 DMC DeLorean
1971 Torino
1966 Thunderbird 390 FE HI PERF T-L (Red)
1966 Thunderbird 390 T-L (Black)
1950 Buick Special
1997 Subaru Impreza AWD
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