Canadian 305 block 14010208 ID

[zz1958]

Greetings gear-heads, Got this engine in a 1978 Silverado:
GM block casting number 14010208 marked 5.0 LG Canada with knock sensor.
The first 4 numbers are cast badly and hard to read (the 4 is a guess) the last four are in good shape and I'm sure of them.
heads 14014415 intake 4bbl 14057053. K0527ADD Engine ID code stamped on pad.
All the info I can find.
heads 14014415 1.72in. 1.50ex. 76-79 305, 80-82 267-305,83-85 305.
aluminum intake 4bbl 14057053 83-85 305 impala,caprice
McKinnon Industries Canada, May 27 engine suffix code ADD.
I'm thinking a 1985 LG4 305 150-160hp, but I would like a second opinion. I've searched though everything I can find and haven't found a sbc casting # 14010208. They do exist I have found sprint car rules with the block listed. Also haven't found engine suffix code ADD.
Any help would be appreciated.
Going to put this in a 95 S10 in the near future, runs real nice.