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Re: how to decode my engine
TKB 76 350 Truck 165 LS-9 4-Brl
TKB 77 350 Truck 165 LS-9 4-Brl
TKB 79 350 Truck 165 LS-9 4-Brl
TKB 92 350 Truck 210 L-05 TBI
So you ruled the last one out due to block casting number. 76/77/79 350.
The C7Z I have not seen before. Assuming the rest of it holds true to form, I would guess the 7 is your '77 date, and Z is the Fremont plant, which did assemble GMC trucks.
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2003 S10, 2.2 auto- the daily driver, currently with a 2"/2" drop and some minor engine bolt-ons
1978 Impala 2-door, race 350/T350 - the new race car, in progress
1968 Chevy C10 longbed- 3/5 drop, currently undergoing a heart transplant
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