need some help.

my car was running sweet in october but the tappets were rattling on.

got a stage 2 head and had it fitted.

now im told my compression is....105,90,90,100.

also overheats and struggles on acceleration for power whereas it never used too.



whats happening?????????


garage reckon it is the springs in the bottom end.

but if it was fine before the head....then would the head be the problem??

seriously i need some help, do i need a new head or is the engimne naff?