Quoting: Roadkill
It never ceases to amaze me how optimistic people are . . . they rebuild an engine (with apparently stock parts ?), add some valve covers then start quoting figures of 350Bhp - What 100+Bhp more than stock ?
Well the rebuild is worth 50bhp, the valve covers 25bhp each
Also note " The engine was rebuilt about some years ago " when the car was built some years ago