Facing the engine and to the right of center just below the intake manifold you will see a flat area about 1/2 inch wide and 2 inches wide. The numbers will be stamped on that area.
Chevy used to make a 427 big block, but the 427 small blocks are made from aftermarket parts.
Engine block casting number
427 = 4.250" x 3.76"
590
Well since a 427 is a Ford and the Car is a Chevy. It would be a safe bet that you are looking at Custom made Headers. Hope This Helps.
Heads: Casting Number 3904390 - 1966-68 427, Intake 2.06, Exhaust 1.72, Closed Chamber, 98.4 CC.
A 427 bored .60 over is 438.8572417 or basically a 439.
Chevy's 427
1966
yes
NO! The 427 Chevy engine was not sold by GM until 1963. The 427 is a big block engine and the very first big block was the 348 introduced in 1958. The 409 was introduced in 1961. The 427 in limited production only in 1963. The 427 was later released again in 1966 as a production engine. The largest engine every offered in the 1957 Chevy was the 283 V8. You could order this engine with mechanical fuel injection in 1957.
7 x 61 = 427