Originally Posted by plym49
? Looked like the valve covers are canted; is that really a nailhead? If it is be careful because on the early cast iron nailheads there is not enough material to install stellite exhaust valve seats - the machinist will cut right into the water jacket.
That car has a rope driveshaft, yes? and independent rear suspension? GM had some innovative shit back in the day.
Hope you save that motor.
EDIT: Of course if they are AL heads they already can accept hard seats. Doh.
I guess it's a nailhead? It's a 61 all aluminum 215. 4 barrel. It has a straight axle in the rear, air cooled trans that never was any good. I found this.:
There were six displacements of the "nailhead" in two generations between 1953 and 1966, varying from 264 cu in (4.3 L) to 425 cu in (7.0 L); three displacements of standard cast iron small blocks between 1964 and 1981, and 300 cu in (4.9 L) and 350 cu in (5.7 L); one of the 215 cu in (3.5 L) aluminum blocks (1961-1963)
; and three big blocks between 1967 and 1976 and 400 cu in (6.6 L) and 455 cu in (7.5 L).