Wow, I stand corrected (and it's about time)!
I've been a Mopar guy since my teens in the mid '70's. I've never had an LD4B, but they have been legendary since I can remember...
I have had that D4B on a 318 in a '64 Valient that I drove for over a decade and although it was pretty normal to be asked about it, I was never corrected when I explained as above, what I believed to be true.
My apologies to all I may have misled over the years! I bought my D4B for cheap at a swap meet long ago, and I'm pretty sure the seller is the one who told me that story.
As for the manifold bolt angle, being aluminum, you can see the the bolt threads had just cut their own path a bit to correct their angle. I never thought too much about it even though it's been on and off the 318 many times.
Actually, I think this is good news, if I'm not mistaken, D4Bs essentially are LD4Bs with an easily correctable bolt angle!
Also good to know about the LD340...I always wondered if there was a difference, or if it was just a slang expression for LD4B.
Now I'm a little less of a dumb- a** than before this thread. Thanks for the schoolin'!
