I had one of those cheapo chips off ebay for my last 8v, I think it made the midrange response a little better but the car was completely standard other than the chip so it didn't make a great deal of difference. I'm sure that coupled with a kent cam and some sort of filter/induction kit the differences would be much more noticable. I paid about ?22 for my chip on ebay just to give you an idea. Make sure you get a proper copied IC though and not one of those resistor chips which aren't even worth the cost of the postage stamp!!!