I'll lay you odds 20 to 1 that your Exhaust valve hit the top of the bore on #5 and #7 , and I wouldn't be surprised if the others have nicks in them from touching.

ThiTke heads on a 5.7 block with less than 3.957 bore are asking for issues. both performance and physical.
I did a 377ci (3.922 X 3.90) back in March, I had to notch the bore back to get good clearance and better power #s than stock Eagles on that build.
used the 6.1 Head gaskets notched the bores on both Intake and Exhaust side, did both sides back to the gasket and down to the top ring travel.
On a stock 04 5.7 block we test fitted the THitke heads and on that block, #1,3,5 and #6 exhaust valves physically hit the block....needless to say that block wasn't used for this build.

that was my result

PS, I guess I don't need to chime in on the tone ring, you know by now you need the 32 tooth.