Originally Posted by Pre '68 Dave
3/8" coarse.


And not too long! Don't want to damage the timing cover (only once and it way a very long time ago!).


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