Is More Flow Better, Is The Smallest Intake Port That Flows The Most The Best

273 said

340 is slightly on the small side and a fairly low power with reasonable powerband, never heard anyone say 340 would be better off with smaller port now most start with a 360 thats 20+ cid over a stock 340, ideally at minimum you think you want to start with a head slightly more port then a 340 even for a mild combo nevermind something with some teeth to it. Even a 318 is only slightly smaller than a 340 especially with an overbore, it has heads originally designed for a 273.

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Think about this.

The W2 head was designed for 340 inch engines. Look at the cross section of that head. And that was 1975.

That head is too small for 340 inches turning 8500.

Ive seen heads that were said to be Glidden’s heads but year later I was told if they weren’t brazed up they weren’t his heads.

I’ve seen fully brazed, record setting 292 GM castings by Lee Shepard (he had 2 pairs and a spare and the receipt for them so I know they were legit) and they were brazed up about everywhere.

And those heads were for a 287 inch engine turning 9100 in the lights.