You have a "bypass" engine, since there are no big (1/2" NPT) ports that would identify a "full flow" engine. Even the later (1959-63) 261's would have probably been set up for bypass filtering unless the big dowel pin on the driver's side of the block was pushed in. If you choose to use a bypass oil filter (not necessary- - - -lots of engines had no filter at all) the restriction that controls oil flow through the filter element is built into the canister.
Jerry
Thanks Jerry, a bypass engine perfect explanation that’s what we deduced with me pinching off the clear line but still had me pondering exactly what engine I had, the clear line was never going to be permanent only for observation of flow seeing there was no dowel pin on this block.
When I got this engine from the scrap yard it did have an canister filter on but there were no obvious restrictions on the fittings or oil lines other than the small hole in the drain pipe inside, which makes me wonder why the rocker shafts were badly worn so I replaced them with the 216 shafts that showed no wear.
I do agree that it’s not necessary to have a filter and that’s probably the way I’ll go. I may just put it on for looks but plug it so it will have good flow to the rockers. Not like this truck will be worked very hard other than ice cream runs and shows.
848 head has the “steam holes” and the oil line was cleaned and reinstalled!
Oil does flow to the head without the head bolt with the hole in it as soon as I pinched the line off.
Fox Johnson a fellow bolter pulled a head bolt on his 57 261 and discovered a grove was cut in the threads as opposed to the hole being drilled, now that was definitely interesting but I’m thinking that could compromise the correct torquing of the head.
Thanks for the input everyone.
