some more... air filter oil bath found to be spilling oil all over during rough wild rides.... now sporting a Chrysler slant 6 paper filter...works great fits great.

Lots going on there......first of all I sued the stock intake exhaust manifold of the 261.......however the engine compartment and engine cover was so tight that I had to remove the original 1959 GM truck vacuum fitting...... there is only 3/4 inch of clearance between the engine cover in the pass. side and the sheet metal get burning hot....kids getting a ride in short can be seriously injured. Not an issue in your model....... Originally the inside of the engine cover was lined with a 1/4 inch asbestos pad which was all carried away by mice for nesting.... so I cleaned what was left and installed a 1/4 inch of ceramic cloth.......... inside is still hot but bot skin burning hot.; Some of the plumbing I had done to fit the temporary steamline is visible.........

Next picture is the engine running at a fast 900 rpm during the earlystageofraod testing as a driveable self powered frame..... no body or license yet but I use my back field as a test track.
I have added a tachometer since...... I use a tach, oil pressure, temperature gauge and vacuum now permanently installed just below the cowling that carries the steering wheel. Not original but I like to see what is going on under the hood while driving...... I have about a 400 miles of back field running/idling and 700 miles on the new civilian instrument cluster that I eventually installed.

The next picture....lots of info....

The new YF carburator, I mean ebuild by a pro, model suggested by CarbKing....out performs the new army surplus Rochester carburator...... Rochester leaked everytime I did rough off roading and gas leaking ontop of a red hot exhaust manifold isnot good. It also has good response purrs like a kitten. The oil bath air was modifed based on Stovebolt postings...... found that the Chrysler 6 cyl. sland 6 iof the mid 50s fitted perfectly well within the original black GM box...... added some green foam for a tight fit....... engine loves it...... no more oil spilling over my clean engine while jumping logs.....

Onemore thign to notice..... remember my earlier picture where Ihad toget rid of the vacuum pickup fitting from GM ..... well I plugged up the hole with a brass plug...... then and made a 3/4 inch thcik spacer, copying the shape of the phenolic spacer...... then drilled and tapped the spacer for brass fittings for the vacuum gauge, the wipers, and for the line from the Positive crankcase valve tubing. The littel sectoin of red foam was to keep dirt out of the vacuum intake line that was connected to the side of the original 1959 GM truck air breather assembly.. I now have installed a slightly modified 216 valve cover which uses itsown small oil bath air cleaner as intake for the PCV system. Most original 216 valvecovers have been serioulsy abused and the nuts over tighten and distorted that they leak like an old bucket.

Solution by a new valve cover from China fully chromed....... makeusre it is a straight one.... sand blast the chrome finish lightly to make it satin finish and now the engine paint will stick real good. Call me crazy but the recommended GM grey blue paint in spray cans is not the real cololor tomy eyes....... so I use regulary available Ford six cyl. Bluel in engine hi temp spray cans........

Final issue,...... your steam line or just fitting the temp bulb of your new gauge may be a head ache. You mentioned that you had installed an "oil filter" on your engine..... did you use the original CMP GM oil filter installed on a bracket bolted to the head....... it is usually a headache fitting the sender in such tight proximity to the back side of the original oil filter bracket..... I really need to see your oil filter set up....... the 216 had a by-pass filter.... that could be removed... or in fact early engines did not have one and were retro fitted...... yoou can run a 216 without a filter but will burn your engine ifdriven extensively with out a filter and the oil ports plugged.

You should include in you next posting picturesssssss of the oil filter arrangement you have or propose to install on your 261..... also need to establish if your engine came from a GM truck and might have solid valve lifter ( you were lucky once maybe lucky again) or a car Pontiac or Chevrolet which would have hydraulic valve lifters and your oil filter set up maybe totally different

My truck engine has two large 1/2 steel line outlets and inlet just behind the exhaust pipe underneath the exhaust manifold..... or you may have two small 1/4 inch or 5/16 linecomng oout ofthe blcok at the same place going to a remote filter....of some sort.....


Catch a glimse at the plumber nightmare to fit the temp bulb into that location.....the bulb is actually within the coolant inside the T fitting..... after fitting the valve was removed and copied a steelline topermanentlly finish the set up.

On my truck I have piped my 2 large 1/2 oil lines to a bracket that accepts two PH-8 screw type cartidges full pressure filters..... those double filter brackets were used in the early 50's on hot rod race cars and are found used cheap at flea markets....... the bracket is installed vertical on the inside of the frame below the pass. seat....... totally invisible........ it provides additonal cooling of the oil and increases the capacity of the engine crankcase by about one and a half quart ( almost 2 lts) of nice clean oil.

Please do not be shy about asking questions as they arise... you are surrounded by good help with Hanno, Alex and others.
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Last edited by RAC1812; 01/19/2023 4:09 AM.

Bob C.
CMP Heaven
The Hammond Barn