Mid-America Chevelle Club Mid-America Chevelle Club

Dedicated to the preservation and enjoyment of all stock,
modified, and custom 1964 - 1987 Chevelles & El Caminos

Alloy Rectangular Port (Except where noted)

CASTING NUMBER YEAR APPLICABLE ENGINE CID HORSEPOWER RATING RPO CODE
3805069  1966 - 68 396 375hp L89 / L78
3866963 1965 396 375hp L37
3885069 1966 427 425hp L72
3886093 1967 427 430hp L88
3894374 1967 427 435hp (3 x 2 barrel) L71
3894382 1967 427 (oval port) 400hp (3 x 2 barrel) L68
3919850 1968 427 (oval port) 400hp (3 x 2 barrel) L68
3919852 1968 427 435hp (3 x 2 barrel) L71
3933164 1968 - 69 396 427 375hp 425hp L78 / L89 COPO
3933198 1969 427 430hp ZL1
3937795 1969 427 (oval port) 435hp (3 x 2 barrel) L68
3937797 1969 427 435hp (3 x 2 barrel) L71
3963569 1970 - 91 396 / 402 454 375hp L78 / L89 LS6
3967474 1971 454 425hp  

Cast Iron Oval Port

3966948 1966 - 67 396 427 360hp (Holley) 390hp (Holley) L34
3883948 1966 - 68 396 325hp (Q Jet) L35
3931067 1969 396 325hp (Q Jet) L35
3955287 1970 - 71 402 330hp (Q Jet) LS3
6263753 197 402 240hp (Q Jet) LS3