Direct Connection ( Mullen LA ) heads

K.O. SWINGER said

This information confirm my knowledge type of casting or design it is very strong at low lift numbers and benefit from more duration. I realizing compression is a consideration but it would help you extend the RPM range while decreasing un desirable angles and possibly unstable valve train. If we were talking about Apache heads or ls'cathedrals I would say yes and jam those valves to the Moon but we're not? 6,500 or 7,000 is one thing 8,500 or more it's night and day.

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Chryslers do great without monster lifts for the very reasons you stated... thats why they can dominate stock class racing.
When it comes to stock head castings...there are so many cookie cutters copying chevys... and they end up running like ****. ..dogs...
Once you get a well modified or better design usage of the same constraints..then you can do that and see positive results. They're all animals...right... just different species that like different things... and until you make them clones... they will have different appetites.
Anyone who wants to buzz 7500 with a 360 and live...all they have to do... is full groove mains, proper oil clearance, deep baffled pan ...and a good balance job.
Extra aside from that would be to make sure the galleys are sized and not stepped down as some are.
340s need bearing mods, period.
Narrow up the lsa, decrease the int cl ...easy rpm