261 head (and gasket) has coolant passages drilled between cylinders 1 -2, 3-4 & 5-6.


BC
1960 Chevy C10 driver 261 T5 4.10 dana 44 power loc
1949 GMC 250 project in waiting
1960 C60 pasture art
Retired GM dealer tech. 1980 - 2022