I have a portflow GSR head that has been through 2 engine failures. 1st time the stock sleeve let go and it got a little messed up but not bad. I sent it to Laskey and they had Portflow fix the head and it go cut down a good bit. Well a mishap with improper a/f readings landed me a melted piston on the last go round and I think the head may be toast. I have a stock untouched head, but I really want to reuse the portflow. The head made great power and I would really like to use it again. I know its as simple as getting the fresh head done, but lets face it, i'm not trying to be a hero @ the track and a stock head would be fine, but I know its going to suck going from it to a stock head.
Talking with the machine shop, the head has been cut down 40 thousandths and its pretty much flush with the "service tabs" that are on the head. The machinist says, his book says the head is "good" with no headgasket shim up to 58 thousandths, to me that seems like a lot and my dizzy was maxed out to achieve proper base time at 40thou.
I have a couple pictures here of the areas I am concerned with. The quench pads are pitted from the heat and I am looking for a "go", "no go" or a fix for an answer, and if you guys think that the head could be cut again to remove it and it still be usable in a performance application. (700+hp)
p.s. I am aware that the "chunks" missing wont go away without some sort of welding/grinding.

These are of the worst cylinder.

 

endyn can weld those and fix them...but you can defitnely use it just take out the sharp edges by sanding and then u probaly have to cc combustion chamber...but i would send it out to endyn like 400 to fix he charges 200 for new valve seats and 200 for welding chambers...yo can also get his taper valve guides while your at it...200 more and its still half the price of doing another head...

 

Its not the chunks that I am worried about, its the pitting from heat on the quench pads. Its rough almost like sandpaper.

 

well endyne can fix it send him an email...he quoted me 400 for new seats and gsr quench pads on my itr head...

 

that head isnt bad at all, can easily be fixed by someone local that knows what he is doing.

 

i believe all of the valve seats are fine on the head...thats not an issue.

 

they can just weld and cnc it...ive seen it done before...welding up the chambers and cnc them out is a common thing these days.

 

if you weld the heat will warp seats...2 different metals..i would rather do it right...

 

depending on the tig welder, zapping little divots like that should not heat the head up enough to start warping ****.