08-12-2005, 03:47 PM
bill hA Plea for Help From the State of Nevada
With the power and RPM band of our engines, the number of main bearing cap bolts is of no consequence.
If Timothy has FOUR bolts, then I want four bolts....What size are they anyway?...Maybe I'll just slide two more down the oil tube
08-12-2005, 05:36 PM
timnlanaLee:
The notes I found said Z was used for 1973 4 bolt main 454s and S was used from 1974 to I think 1978 or so for the same engine.
Ralph's note suggests that Z and S were used indiscriminately. The web page I visited did not list a 2 bolt 454 in any of our chevy P30s.
Timothy
[This message has been edited by timnlana (edited August 12, 2005).]
08-12-2005, 06:18 PM
REGLOVERGuys my 1974 service man Y= V-8-350-4
Z= V-8-454-4
In my 76 update manual S=V-8 454-4
Y=V-8-454-4
1988 manual W=7.4 V8 4BBL LE8
N=7.4 V8 TBI L-19
THE 4 MUST BE A 4 BOLT MAIN.
RALPH