340 with edelbrock heads overheating

Early a body said
i measured the push rod length and its 7.5. so i am good there. my thinking now is its cam timing and may have been like this prior and the edelrock valves hit again bending valves. not sure how i did not have the over heating problem before. i am going to be incredibly pissed if both heads have bent valves.

I am going to take both heads down to the engine builder and have him check both out and take him the motor and tell him to figure it out since he built the dam thing. He better pay for the repair too.

But if I'm reading this right, he built it with the 340 X-heads. And it was running fine.

Then you changed the heads to Edelbrocks and then had issues.

Sorta take's him out of the loop since you did that major change.

But looking back at the original post you swapped 340 X head for Edelbrock heads. Typical 340 X head is around 72cc's. Edelbrock 60779 head is 65cc +/-1 cc. Unless I'm missing something, I've only read about 75% the pages of this thread.

That's a significant compression ratio change from what the engine or originally built at. Can the octane of gas you are using work with this new combo

340 .40 over with less than 1,000 miles on rebuild
stock pistons
flat tappet cam
initial timing at 12 degrees
edelbrock avs 800 cfm carb
1964 dodge dart

I decided that i would swap out the x heads to eddelbrock 340 heads.
Installation went fine but now i have developed an overheating problem.
At idle it will heat above 210. I have not tried to see where it would stop i just shut it down.

the radiator i had on it cooled just fine would not get past 180. This was a champion 2 row 19"- this is on a 64 dart

Changed to a wider 22inch 3 row champion radiator that i had stored away. no difference
changed to a 160 thermostat . no difference

Using 273 adjustable rockers and double checked to make sure the valves are adjusted properly

coolant looks good . I am using prestone 50/50 premixed

oil looks good Valvoline 10-30 vr same oil i use in all my flat tappet cars

Not sure what else it could be. Did the head gasket blow but did not cause cross contamination of the oil and the coolant?

Thanks in advance.