340 with edelbrock heads overheating

Not if the cam cam has advance ground in. Most cams do, especially comps. Usually they’re +4 when installed dot to dot.
so you have seen it where the intake lifter is higher than the exhaust and everything was fine.

The cam grider guy i spoke with did not leave me with alot of confidence. Either he did not understand my question or did not want to tell me i messed up. They are a very reputable cam grinder so when they told me it sounds like i installed correctly i was relieve but then i started looking online...... i am still thinking of tearing the timing cover off again and double , triple check my work.