Winters foundry with GM #3814881 casting number. Oil galley baffle is rusty and dented, but I left it on for your discretion. Fresh from 40+ years of storage, here's a GM 409 V8 2x4 Dual Quad intake.
1961 62 63 Chevy 409 C-1 Corvette GM 3779553 Aluminum Bellhousing Impala Belair
SBC Tall Oiler sprayer Chevy Bowtie cast alum valve covers race drag 62426-6
NEW WEIAND STEALTH INTAKE MANIFOLD,CHEVY,BBC V8,396-502,RECTANGULAR PORT HEADS
OEM 1959 1960 Chevy Impala V8 Gas Pedal Throttle Lever and Linkage B63-74