The Stovebolt Site Forums The Shop Area Engine Shop Where is info on FULL FLOW re 235s and 261s

will someone direct to the info on determining if a 235 and or 261 is full flow oil .I've got a 261 with block #3769925 and head 3836850.I've got 235s and a deal on another 261 but don't know if I'l need to convert any or all .So is there a link or tool to know what they are?Thanks Sid Stephenson

I take it that you're asking about full flow oil filtration, and not full pressure lubrication. On the full flow filtration, 235s never came that way from the factory, only bypass. The 261 went to full flow filtration in '59, and can be identified easily by chacking the size of the oil line fittings. They are 1/2" npt on full flow engines, 1/8" npt on bypass.

Check out this: http://www.stovebolt.com/techtips/full_pressure.htm for full flow filtration