'67 GS 400

Specs-HeadsBig Block heads are a find. Buick made numerous different sets throughout the years. Some of these heads flowed better than others. Identifying heads (engine size and year), however, can be a difficult job. This chart will help by providing you with casting numbers so you can determine what you've got, or know what to look for at your local parts yards.
Chart based upon information from Kenne-Bell and Buick Service Bulletins

Year	Production Head Casting Number	Service Replacement Head Casting Number	Cylinder Block Casting Number	Intake Manifold Number	Head Chamber Size in cc's
1967	1377979 (400) 1377980 (400) 1372963 (430) 1382963 (430) 1382985 (430) 1382986 (430)			1374062	69cc (400/430) 57cc (340)

*Heads in Bold are "Big Port" heads. These flow about 5% better than regular heads.

Specs-Engines

HP	CID	C.R.	Make model/Transmission	R.R. Lifter	Head cc	Notes
160	225	9.00	Roch 2GC-7027042/SM	1.6 H	51.1	2
210	300	9.00	Roch 2GC-7027046/SM 7027044/AUTO	1.6 H	54.9	2
220	340	9.00	Roch 2GC-7027046/SM 7027044/AUTO	1.6 H	54.9	2
260	340	10.25	Cart AFB-4332S/SM 4331S/AUTO	1.6 H	54.9	1
340	400	10.25	Roch 4MC-7027148SM 7027146/AUTO	1.6 H	67.6	3
360	430	10.25	Roch 4MC-7027248/AUTO Only	1.6 H	67.6	3

Notes
1 - Carb sizes - 1437 x 1437 / 1125 x 1250
2 - Carb sizes - 1686 / 1250
3 - Carb sizes - 1375 x 2250 / 1093 x AV

Specs-Valves

HP	Disp.	Deck CL	Valves	Cam Lift	Springs
160	225	.010	1630/1380	401/401	Outer Only
210	300	.010	1813/1375	393/401	Outer Only
220	340	.010	1818/1375	399/399	Outer Only
260	340	.010	1818/1375	399/399	Outer Only
340	400	.010	2000/1630	421/450	Outer w/Damper
360	430	.010	2000/1630	421/450	Outer w/Damper