340 intake on a 318?

cudamark said

A big port intake on a small port head is a mismatch in my book. The first factory LA 318 4bbl's started in 1978. By then you had lots of smog equipment, different castings, but still, ports that matched. Mild cams, lean burn, thermoquads, mild compression ratios and cams, restrictive exhausts, etc. Totally different animals. Some combos work fine, some don't.

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You can throw up all the excuses you want, the fact remains, Chrysler did it and didn't think anything of it. With a 318 built for performance with a good ignition curve, decent gears, and in a light A body It'll never be noticed.....and wasn't in much milder and much higher geared heavier vehicles. It's just a non issue. If you had a bog with the "mismatch" as you call it, I can promise you it was somewhere else.