[PeteLeathersac]

Got the pics, here's what I get below.
When you can read Vin stampings, counting backwards the <span style="text-decoration: underline">8'th digit from the end</span> denotes model year.
Best always confirm block casting # jives w/ what you see.
If you can read the CMA block Vin check for model year digit (probably a 4).
[img]<<GRAEMLIN_URL>>/beers.gif[/img]
~ Pete

Casting # 3970010
Build/Suffix - V0404<span style="font-weight: bold">CMA</span>
Vin - Illegible
Applications - '72 307 or '74 350


Casting # 3970014
Build/Suffix - T0816<span style="font-weight: bold">CMR </span>
Vin - 1<span style="text-decoration: underline">4</span>B410273
Application - '74 350/145 Hp


Casting # 3914678
V0624<span style="font-weight: bold">ME</span>
Vin - 1<span style="text-decoration: underline">8</span>N463493
Application - '68 327/210 Hp Camaro
* Orig. engine from VIN;
124378N463493 - Coupe
124678N463493 - Convert.