Cylinder Head differences

[JBOYLE]

With my Avanti R-1 engine apart it looks like the cylinder heads are part #
1557570...which is for a 62-64 V-8.
My trusty parts book says they should be 1557571.
What's the difference and more to the point does it matter?

63 Avanti R1 2788
1914 Stutz Bearcat
(George Barris replica)

Washington State

[StudeRich]

They ARE 1557571 heads John, you are looking at the CASTING NUMBERS! [:0] They are 8.5 to 1 on Std. 289 full dished piston, and 10.25 with flat tops. Around 9.0 to 9.5 depending on gasket with shallow dish.


StudeRich at Studebakers Northwest -Ferndale,WA

[JBOYLE]

quote:Originally posted by StudeRich

They ARE 1557571 heads John, you are looking at the CASTING NUMBERS! [:0]

So the casting #s are the part #s some of the time (at least on Avantis)?

The reason why I ask, is I see that the left exhaust manifold # is 536495 (applicable to all 55 to 64 V-8s), whereas the Avanti only right exhaust manifold has not only a different #... its within a different system...1558255.

63 Avanti R1 2788
1914 Stutz Bearcat
(George Barris replica)

Washington State

[StudeRich]

The casting numbers are almost NEVER part numbers, the left manifold is a 536495 casting, but it's part # is 536195 because it's number was created for 1955 year model, the 1558255 is merely a way higher, very new number for a 1963 yr. model, the number sequence has NOTHING to do with it being an Avanti, other than it is Avanti peculiar, because it has no Alt. mount.

[R2Andrea]

A Casting number is the part number for the casting only. The part number that appears in the parts books reflects a finished assembly. In the case of the head, it includes the valve guides, for the manifold, the studs are part of the assy. Another example would be an engine block. The full flow V8 blocks (259, 289 & 304.5) all have the same casting number, but you will never find that number(1554641) in a parts book. They weren't available as a casting only but came with main caps, core plugs, oil gallery plugs, main cap bolts, cam bearings etc.

R2Andy

[WCP]

I believe 1558255 and 536195 are the same casting but 1558255 has longer studs installed for the heat riser.