Engine suffix: II223HC (passenger side front of engine)
engine formats are in this format:
F: Flint Motor Facility
K: McKinnon Industries
V: Flint Engine Plant
So first letter is one of these:
Next 4 numbers are the date: 2 digits for month and two for day, so if it's actually 1223 then that would be Dec 23, 1966. Last two are application, in this car HC is a 327 275HP with Powerglide trans.
Head casting: 3890462 (Has double humps)
This is the correct casting for a 1967 with 327 275 HP with double humps
Trans : 12 28D T 12 27D (On oil pan passenger side)
Powerglide Trans had a stamping on the bottom of the pan in this format: C 11 16 N, decoded to mean: Cleveland, November, 16th, Night Shift.
A powerglide for a 327 should have a letter T for Toledo rather than a C.
Not sure on these stampings.....
Rear Axle: EO 1227G On tube assembly passenger side.
This Axle decodes as follows: EO: 1967 Heavy Duty Chassis 3.55 Ratio non-posi, 1227: December 27th 1966, G: Detroit Gear and Axle
Hope that helps,
1966 Impala SS
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