Got a nice 60k 4efe out of a sr here and going to keep it for my other sr so I want a build a high compression 4efe, is fte anthena head gaskets same as 4efe ones? What else can I do to increase power? Port and polish, head skim etc , just want more power and don't want to do a turbo conversion as it's a sr want to keep it as it is with 4efe