Bob's Resource Website (2007)
Studebaker headcasting numbers
(Sourced from newsgroup forums)
Studebaker Casting # (Casting #'s are NOT Part #'s)
(updated Jan 2006)
| Casting# |
Part# |
Year |
Gasket |
Compression |
Capacity |
Comments |
1537555 | | 55-61 | 1535982 | 8.00:1 | 54.5cc |
| | | 1545072 | | 8.50:1 | 54.5cc |
| 1535976 | | 56-60 | Std | 7.50:1 | 58.0cc |
| 1555294 | | -1962- | Std | 7.75:1 | 56.5cc |
| 1555295 | | -1962- | Std | 8.25:1 |
| 1557582 | 1557580 | 61-64 | Std | 7.00:1 | 67.7cc | Truck |
| 1557581 | | 63-64 | Comp | 8.00:1 | |
| 1557580 | | 63-64 | Std | 9.00:1 | | Standard R1 heads |
| 1557579 | | 63-64 | Std | 8.5:1 |
| 1557570 | 1557571 | 63-64 | Std | 8.25:1 | 54.5cc | all 63-64 |
| 527772 | 527222 | 51-54 | Std | 7.00:1 | | all 51-54 V8 |
Casting# 1557582 are the R2 heads that have about 67 cc's and the Casting#
1557570 set is R 1 that has about 54 cc's. A 63 or 64 truck with either a
259 or 289 has the same casting number head as the R2.
With flat top pistons, the 67 cc (Casting 1557582) will give you about 9.0 compression
and the 54 cc's ( Casting 1557570) about 10.25 or with dish 289 pistons about 7.5 and
8.5 respectively with the beaded steel head gaskets.
The 67 cc's ( Casting 1557582) came on some trucks also and the 54 cc's ( Casting 1557570) were
on most of the '63, and '64 cars and a few of the '62's.
Casting 1537555 = 8.0 used on '55-'62 with composition head gasket and about 54.5 cc
Casting 1535976 = 7.5 used on '57 Golden Hawks with composition head gasket and some trucks and were about 56.5 cc
Casting 1557582 = 7.0 supposedly used on some trucks and are also the R 2 with 67.7cc
Casting 1555294 =7.75 used on '62 with the composition head gasket
Casting 1557570 = 8.25 used on '63 and '64 with the beaded steel head gasket and also
used on the R1 engines and have about 54.5 cc but also heard one time they
were 58 but I think the 54.5 is closer.
Casting 1557581 = 8.0 and also used on '63 and '64 but with the composition gasket
The beaded steel gasket will give almost a half point higher compression
ratio. The beaded steel is about .017" thick and the composition about .045
(compressed).
Ted Harbit (Oct 99)
On the cyl head center exhaust ports there is a raised number CAST in
the iron in between the head bolts. Not a stamped number.
It can be read without removing anything , except maybe dirt. It is
not the part number you find in the books, but it is what most of us use
to identify matching pairs of heads.
Except for the very uncommon R2 heads (582, which have big
combustion chambers), the uncommon 1951 to 1954 232 heads (really tiny
valves), and the super-rare tall-port R3 heads, ALL the rest (976,
570,555,etc) are pretty much the same- mid-50's cc's, same valves, etc.
All the different compression ratios in the books were a function of
stroke, and different piston dishes as much if not more than the small
variances in head cc's.
David LeVesque (OCT99)
Casting # 1557570 is part # 1557571. It was used in most R1's. With the
flat top pistons, and head gasket 1545072, it gave a 10.25 : 1 compression
ratio. It was the "standard" R1 head in the sense that almost all R1's
came with it. It was also used with dished pistons in other engines.
Casting # 1557582 is part # 1557580. It is shown in the Dec. '63 Avanti
parts book as the R2 head; and also "spec. order" on R1's. As used, R2 or
R1, it gave a 9: 1 compression ratio. I've read it was used in lower
compression trucks, too.
On some lists of head #'s, (John's, if 1557580 is a part #), the lower
compression, (9 : 1), R1 is listed as "standard".
Mike M. Jan 2006