Chris - The …54Z suffix on the serial number stands for 1954 “Regular” 235 in a passenger car with standard clutch and manual transmission. From the 1954 Chevrolet Data.

Definitely originally a solid lifter engine.

G74 casting date decodes as G = July 7th, 1954.

smile


~ Dan
1951 Chevy 3 window 3100
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"My Grandpa Carl's Truck and How it Became Mine"
1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)