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Re: Rebuilding Head
Typically the exhaust valve guides will have to be replaced. They wear out well before the intake guides do.
You mentioned that you thought he head was warped. If it is, throw it away! Youc anget the bottom of it made flat but what about those cam journals? They will be out of alignment if the head is warped! (You would have to have the cam caps cut and the the head line honed to correct for the warpage. Too many $ spent.)
If you want more performance form that head consider mildly porting it with the valves out. Eliminate the sharp edges around the valve seats. Clean up the "valve bowl" region and make the intake port floors flat. Don't go nuts with it. Doing these few things really helps the motor breath. It makes a noticeable difference in performance!
If you wan tot test a head for warpage, remove the lifters and reinstall the cams. turn each cam with your hand. If they trun easily, the head can be planed and it will be good to go. If they bind, the head is junk.
BTW, planing a head (and block) will make the cams slightly out of time. You should have adjustable cam gears and have the cams "dialed in" if you want the last ounce-inch of torque from that motor!
Rick
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