Sigh. I need some block/head/tranny identification help

Recently acquired a 1967/68 383 block & heads, and what's supposed to be a 727 tranny.

Here's what I've determined so far:
Bloc casting number 2468130 9 - 59-71 383 B block. Below the casting number is "LL". I'm stumped here.
Date cast into the block is 12-6-67
Deck plate stamps: D383 (says it's a 1968 383ci); 12162 - this does mean the 2nd block assembled on 12/16, correct? Yes, I realize that casting dates and assembly dates are not the same.
Head casting numbers: 2843906-1 and 2843906-6. What do the -1 and -6 mean? I do know these are 383/440 '906' heads, 1968-1970. Also on a tag near the casting numbers: 01608 (on the -1 head) and 0160B (on the -6 head). They might both be 8, or B, but one looked definitely rounded and the other definitely flat on the left side of the letter/number.
I haven't gotten the engine torn down any further yet, acquired as a block & heads, so I don't know for sure whether it's a steel or cast crank. I was told steel...
On the underside of the engine, near where the starter mounts, I found this number: PT383P23321129. I expected to find a VIN there, but I can't figure this one out. Is it possible that this is a marine/industrial motor? If anyone can decode this for me, well...

I'm not very good with transmission identification. Can someone tell me where to even look for casting/identification numbers? The only numbers I see are "103-5" on the bellhousing, in two places, and it appears to be cast vs stamped. I can't pick it up to check pan shape - with my parts store background, that's my first option for id'ing a tranny - and I wasn't watching when they loaded it in the truck.

If you need more information, I'll call hubby from work tonight and ask him to please look. (Yes, the 350s are his, but he drives a Ram)

Also picked up the differential gears for an 8 3/4" rear end, I'm guessing 3.23 gears (fine for me, will be driving the car to/from work some, and it's a long drive). Axles/differentials/etc are hubby's ball of wax, so I'm letting him worry with that part

Year One Mopar Engine Casting Numbers

There was a really great Chrysler Transmission ID Numbers list, but that website has since been tagged as an "Internet Attack" webpage:

Chrysler Trans ID Numbers, Was Good, but now labeled as Attack Website

There are these links that may be helpful:

Car Craft Torqueflite ID Guide

Torqueflite on Wikipedia

Thanks! The transmission site came up without a problem. I'll definitely check the others here shortly.

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Deck plate stamps: D383 (says it's a 1968 383ci); 12162 - this does mean the 2nd block assembled on 12/16, correct?

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The last 2 means it was assembled on the 2nd (day) shift on December 16, 1967

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Head casting numbers: 2843906-1 and 2843906-6. What do the -1 and -6 mean?

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The dash numbers following the basic casting numbers refer to the casting core used to make the sand molds the heads are cast in. Same for block dash numbers.

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Also on a tag near the casting numbers: 01608 (on the -1 head) and 0160B (on the -6 head).

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Those are the casting dates.

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On the underside of the engine, near where the starter mounts, I found this number: PT383P23321129.

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PT= Plant Trenton
383= Displacement
P= Premium fuel needed
2332= Build date December 16, 1967
1129= 1129th unit built that day

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I expected to find a VIN there, but I can't figure this one out.

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The '68 partial VIN is often stamped in the top of the block where the bellhousing mates to the block.

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Can someone tell me where to even look for casting/identification numbers?

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The transmission part number and build date are stamped in the drivers side pan rail.