Sorry that I forgot to post the casting codes. It's a 1960 261 block with a '56 235 head. The codes for the block are: 3769717, D 14 0 (April 14, 1960). Head: 3836848, C 14 56 (March 14, 1956).

So if I do have a by-pass filter, does it do much good? I guess there's no reason to remove it but I still change my oil frequently, ~ every 1000 miles or so.

Last edited by DJMTruck; 08/04/2017 8:44 PM.
~Denny
1953 Chevy 3100
w/1960 261 cid, 848 head | Weber 32/36 progressive 2 barrel carb. | Three on the tree & 3:55 torque tube | 12 V w/Gener-Nator & 6 V starter
In the Gallery Forum
1998 Chevy Suburban 350 ci awd/4wd