Usually the original mapper would put some info on the outside of the chip with refernce to turbo spec, Boost and maybe injectors. Thing is they may want to re do the chip as modern mapping is a bit more precise than the old days. As said down your way would be mark shead. Or harvey at scs. pend where you want to tracel. MSD are good. So are reyland. Turbosystems at stoke is highly regarded. Tall steve travels from herne bay in kent to stoke to use turbosystems. They are all good. Some prefer one over the others etc etc. Its al down to you. I will give you one bit of advice. CHEAP JOBS ARE NOT GOOD AND GOOD JOBS ARE NOT CHEAP. FACT