What brand spark plug(s) and what's heat range?
Cp

THE HEADS WHERE SET UP BY AFR TO MATCH THE CAM THAT THEY CALLED COMP CAMS AND TOLD THEM GRIND TO THERE SPECS TO MATCH THE REST OF THE MOTOR.I DONT THINK ITS VALVE FLOAT BECAUSE IT HASNT DID THIS THE LAST 20 OR SO PASSES.LAST NIGHT I GOT TO THINKING AND THIS CAME TO MIND,WHEN THE 6AL2 IS BOLTED TO ITS MOUNT THERE IS A STICKER THAT HAS THE REV LIMIT RPM RANGE FOR LOW&HIGH ON IT AND IT IS UPSIDE DOWN.I WONDER IF I COULD BE SETTING IT TO 3700 INSTEAD OF 7300.I COULD BE WRONG BUT I SHALL CHECK THIS OUT WHEN I GET HOME TODAY AND LET YOU KNOW THE RESULTS.

You could have a spring broken. Mine did what you say yours is doing and it had less than 30 passes on some Manley springs I pulled the stud girdle and found one spring had the inner spring broken. Impossible to see without really looking. Just a thought.

Any strange noises while the engine is at idle?

I HEARD A TAPPING NOISE THE OTHER DAY,BUT IT SOUNDS LIKE A HEADER LEAK AT THE HEAD.

I WILL PULL THE STUD GIRDLES OFF TONIGHT AND LOOK VERY CLOSE TO SEE IF I CAN SEE A BROKEN SPRING.IS THERE ANY OTHER WAY TO TELL IF ONE IS BROKEN OTHER THAN BY SIGHT?
AS OF NOW IM INSTALLING MY OLD 6AL BOX AND MAKING SURE THE MAG PICKUP WIRES ARE AWAY FROM OTHER WIRES THAT CARRIES 12 VOLTS.LUCKLY I HAVE SOME FRIENDS WITH THE STUFF I HAVE SO I CAN SWAP OUT PARTS TO SEE IF THEY ARE BAD.

If it's broke you will see it when the girdle is off. I was looking for electrical problems too when mine did it.I found a small chunk of metal laying in the head, that's when I took the girdle off and looked at the springs. Mine would do fine free reving and in the burnout box but would start cut out about 6500 rpm going down the track.

Might have a broken push rod. If you are using a stock type push rod I have seen the small round ball on the top or bottom of the rod sheer off.

IF THE BOTTOM CAME OFF DOES THAT MEAN ENGINE DISASSEMBLY?

Guys, lets get back to the symptoms.

He said at 34 degrees, there was no issue. At 36 degrees, a miss occurs.

A broken spring, pushrod, rocker isn't going to cause a miss with a change of 2 degrees of timing. A broken part will cause an issue at all times, no matter the timing change.