Cyril,
ya the srt comp. is 9.0 while ours is 10 there is a cheap way to lower comp is to add an exta set of head gaskets but ..now this is a big but.. need to look at the fitmit of the intake maifold might need to add thicker gaskets there too..if this was a straight 6 this process is much easer..but u know what we might be able to just install it anyway and produce 350-60 hp depends on the bottom end if it could handle the extra pressure..