Hello,

im trying to rebuild sierra cosworth engine. My block is 205, Head from 4x4. im trying to reach goal of having 400 hp.
I have green injectors and standart 4x4 turbo what was rebuilded.

Im need to change head cam's, should i use oem ones, or take some aftermarkets?
What best head gasket and head bolts to use?

What other mods you advice me to do, because engine is in the rebuilding stage..... so want to do some mods then to get reliable 400hp