Diagrams:

Intake Manifold
(click to enlarge)

B5500	65-67	GASKET SET - intake manifold, 396/427 w/square port head correct "kormetal" w/dark gray color & round tab	51.25
B5519	65-67	GASKET SET - intake manifold, 396/427, hi-perf, rectangular port	34.95
B5503	66-67	GASKET SET - intake manifold, 427 w/oval port heads, correct "kormetal" w/dark gray color & round tab	51.25
B5517	66-67	GASKET SET - intake manifold, 427/390hp w/oval port heads	31.65
B5518	65	MANIFOLD - intake, 396/425hp, casting number #3866963, reconditioned original	895.00
B5518N	65	MANIFOLD - intake, 396/425hp, casting number #3866963, NEW/identical except for area under carburetor, see picture	395.00
B5520	66	MANIFOLD - intake, 427/390hp, GM casting #3866948, reconditioned original, dated, inquire about available dates	295.00
B5590	66	MANIFOLD - intake, 427/425-450hp, #3885069, reconditioned original	895.00
B5529	66	MANIFOLD - intake, 427/425-450hp, #3885069, NEW note: identical to original except for area under the carburetor which does not effect performance, has Winters foundry logo	424.95
B5521	67	MANIFOLD - intake, 427/390hp, GM casting #3866948, reconditioned original, dated, inquire about available dates	395.00
B5511	67	MANIFOLD - intake, 427/400hp, 3x2, casting number #3894382 / oval port	2995.00
B5513	67	MANIFOLD - intake, 427/435hp, 3x2, casting number #3894374 / rectangular port	2995.00
B9160	66-67	PIPE - 90 degree intake manifold, water bypass, all 427 w/A.I.R	57.95
B2062	65-67	PIPE - straight, water bypass, 396/427, press-in type	10.95
B2065	63-67	REPAIR KIT - engine harness, temperature sender wire (dark green) w/terminal & loom	16.10
A1976	63-67	SENDING UNIT - temperature in intake, w/AC logo as original	29.95
A2002	63-67	SENDING UNIT - temperature, (replacement)	16.95
A5525	63-67	WASHER SET - aluminum intake manifold bolts, stainless steel	11.97