BBC Intake Manifold Casting Numbers
ALUMINUM RECTANGULAR PORT - Holley 4V
Casting	Years	CID	Horsepower/RPO/Configuration
3866963	1965	396	375, 425 L-37
3885069	1966-68	396	375 L-78
		427	425 L-72
3886093	1967	427	430 L-88
3894374	1967	427	435 3x2 L-71
3894382	1967	427	400 3x2 L-68, oval port
3919849	1968	427	390 L-36, oval port, Qjet
3919850	1968	427	400 3x2 L-68, oval port
3919852	1968	427	435 3x2 L-71
3919878	1968	396	375 L-78
		427	425 L-72
3933163	1968-69	396	375 L-78/L-89
		427	425 copo
3933198	1968-69	427	430 L-88/ZL-1
3937793	1968	427	390 L-36, oval port, Qjet, Late
3937795	1969	427	400 3x2 L-68, oval port
3937797	1969	427	435 3x2 L-71
3947801	1969	427	390 L-36, oval port, Qjet
3963569	1970-71	396/402	375 L-78/L-89
		454	LS-6, lowrise
3967474	1971	454	425
6269318	1972	454