![Very Happy :D](./images/smilies/icon_biggrin.gif)
is it worth machining back the valve guide(where it sticks out in to the ports)
![Question :?:](./images/smilies/icon_question.gif)
i have access to the kit to port and polish the heads(wont polish the inlet ports just the exhaust)
how far can i open up the exhaust ports?
![Question :?:](./images/smilies/icon_question.gif)
will match the inlet manifold to the heads as req
any help would be good
many thanks mark