I install hardened exhaust seats into all the heads coming from my shop.
See many used heads with recessed valves. Some almost so deep, a seat can't be installed to fix.
It really is not that expensive to get the head work done.
Bolt in lumps 60.00
Head rebuild kit 205 (Contains all parts needed)
Then it is just machine work.
Some of it depends if the guides need replaced. I always put in guides. They are the basis for centering the new valve seat.
The lump kit, you may be able to put it in yourself. A Mill is not required to install them. A large drill press is.
When they cut in the seats for larger valves, while there, they can also cut out most of the valve throat area to gain flow. With same machine. Therefor almost no porting needed.
Tom I cannot install lumps at home I have no drill press and no place to put it. I live in a trailer par and have very little tools anymore, so I have to hire out damn near everything I do.
