Jim Carter has them for both 1/4 and 3/16 inch diameter lines.
http://www.oldchevytrucks.com/cart/...Division+Blocks+&+Bolts&station=


1937 Chevy 1/2 ton
1942 Chevy 1/2 ton
1947 Diamond T Model 509
1951 Chevy 1/2 ton
1950 Chevy COE Model 5700 ~ "Barney" ~ And more pix