There comes a time when we all have to take our engines cylinder head to the machine shop or leave the auto and have it done. Has anyone had the port to manifold matched, both intake and exhaust? And the port runners cleaned up along with the combustion chamber? How about C.C the combustion chambers? Let us know. Happy Trails Beep Beep from Houston, Don.

Donald L. Swinford
Retired 20+yrs. G.M.Engineering Dept.
1987 W124030(got smart)
168,--- miles

Donald,

I replied to you in the Performance Paddock with my answer to this question before I saw this question. It was nothing but my opinion, but maybe you'll enjoy reading it.

Have a great day,

Just a Thought
 

Larry, someones thinking whether it is the first or whatever is where solutions are solved. Thank you for replying. Happy Trail;s Beep Beep from Houston, Donald.

Same ole me.
Still retired from G.M
And still driving my 300E.