cheers for that, forgot to mention its got a group a coil, how much do group a pumps cost? someone said that its better to have a smaller exhaust cam then inlet cam because it retains gas pressure in the head or something like that. shit sold the greys now, slightly annoyed, theres so many bloody experts out there tellin me they were shit but it always ran fine on them and the bores wernt too bad when i took it apart! just need to get the head sorted now, someone tried welding it but the weld turned out to be pourous so im back to square one! is a group a gascket good for 400? its a standard inlet plenum aswell. any ideas on where and how much a .63 is? so siemens 55lbs are the ones to get, do ineed a fitting kit or anything? thanks boys, much appreciated.