Grain truck oil filter housing

young tractor · Dec 20, 2020

Hi guys. I’m switching my 1966 ford f700 grain truck from the 330 motor to a 391. The 330 was worn out. The 391 has an electrical oil pressure sensor set up. The 330 has the traditional oil line to the oil filter housing then to the gauge. The question I have is can I just switch filter housings from the 330 to the 391? They look like the bolt holes are the same. I appreciate your advice.

Hi guys. I’m switching my 1966 ford f700 grain truck from the 330 motor to a 391. The 330 was worn out. The 391 has an electrical oil pressure sensor set up. The 330 has the traditional oil line to the oil filter housing then to the gauge. The question I have is can I just switch filter housings from the 330 to the 391? They look like the bolt holes are the same. I appreciate your advice.

rustred · Dec 20, 2020

if housings fit that would be simplest thing to do.

the tractor vet · Dec 20, 2020

330 and 390/391 are the same block of the F E family v8 or ya can remove the electric sending unit and plumb in the gauge. as the electric unit is a pipe thread.

Russ from MN · Dec 20, 2020

I remember my father doing something similar in the 60's, mainly to utilize a spin on filter, I think the original was a canister. He pulled a semi with a 66 F750, 391 engine after a few years, 361 originally. Those engine would wear out in about 60,000 miles, pulling a 32 foot tandem wooden stringer trailer, could haul about 9 cords of green pulpwood, GVW't of about 65,000 pounds. There were very few diesel trucks hauling wood in those days. There was a little shop in Baudette MN, we took it in one Friday night with the pistons slapping, he put a short block in it and ground the valves, Monday morning it was hauling wood again!

Gambles · Dec 20, 2020

Should work. My brother used to have an International truck that had a messy canister filter. I found a spin-on filter housing in a salvage yard. The hardest part of the swap would be finding the correct gasket, but cutting one yourself shouldn’t be a problem.

Steve@Advance · Dec 20, 2020

So the 330 has a remote canister filter and the 391 had a block mounted spin on?

And you want to keep the canister? Is there something in the way of the spin on that you can't use it?

Rich'sToys · Dec 20, 2020

The original post said nothing about the filter. He wants to be sure his original oil pressure gauge will still work.

used red MN · Dec 20, 2020

He posted the same question on another forum with photos and admits to a small boo boo. He probably saw what TV said and is back at it bolting it all back together.
Forum X post

young tractor · Dec 20, 2020

Thanks guys. I was putting the motor in the truck today. Sorry for not responding. I did post this on another form. I got more responses here. You guys are awesome. I was trying to remove the electrical part on the 391 filter housing. That’s when I snapped the brass fitting off. The bolt holes are exactly the same on the two housings. The oil galleys are pretty close to the same. Should I just try to put the 330 filter housing on and make sure it reads on the gauge? If it’s wrong could it starve the engine of oil. I read somewhere that 330 and 391 accessories interchange. They do look a little different. I appreciate all of your help.

used red MN · Dec 20, 2020

Yep, should of had a back up wrench on the brass fitting. Just guessing you were trying to unscrew the sender out of the bras elbow. Best of luck with your project and Merry Christmas!

used red MN · Dec 20, 2020

I am going mostly by what Tractor Vet said about those engines being from the same family. I have also heard them as being interchangeable. Since it involves the engine oil system I hate to say it will interchange with no problem. Maybe if you pull the filter off of both and see if the nternal passages seem to lead in and out of the filter the same way I would say all is good. I am a little concerned about the additional large plugs in the one in your hand on the AgTalk photos. If those don’t reroute the internal oil flow some way I am leaning towards swapping them is okay. You could also try this as a last ditch effort. Hold a 2 pound hammer against one side of the aluminum housing that has the twisted off brass in it. Then take another smaller hammer and give it a couple good whacks on the opposite side as if you are trying to smash the hole shut. This may help free up the brass piece so it can turn out with the easy out..

young tractor · Dec 21, 2020

Thanks for your advice. I really appreciate it

SVcummins · Dec 22, 2020

Those were the days right there . How many gears does it take to get a 391 to drag 65,000 ?

Angle Iron · Dec 22, 2020

(quoted from post at 02:04:11 12/22/20) Those were the days right there . How many gears does it take to get a 391 to drag 65,000 ?

ost of those trucks had a simple 5 speed transmission with a 2 speed rear end. There were a bunch of these back in the day pulling 32 to 40 ft trailers as well as trucks and pup trailers. 391 fords, 427 chevy's big dodges what ever they were 383-440. As late as the mid to late 70's gravel haulers used these before switching to heavy diesel units. They were slow, used a ton of gas but would start in below zero settings where the diesel units would not. Easy to work on and the engines were cheap by comparison. This was in SD and slowly by about 1980 the gassers had all but disappeared.

SVcummins · Dec 24, 2020

It doesn’t rake to long to pay for the extra Diesel engine code
to pay you back when you actually work a big gas engine
even the new ones don’t hold a candle to the diesel . I do
enjoy hauling with my old two ton truck even at 4 mpg

DoubleO7 · Dec 24, 2020

Make sure the oil passages at the interface of that engine block and filter adapter meet up so as to not be out of line with each other.

The filter adapter from the 330 looks like it might have bypass built into the adapter vs in the fliter. Those large flat but thin hexs might have a spring and valve seat inside.
The 330 adapter also looks like it could accommodate a much fatter oil filter than the one on it.

Grain truck oil filter housing

young tractor

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rustred

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the tractor vet

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Russ from MN

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Gambles

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Steve@Advance

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Rich'sToys

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used red MN

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young tractor

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used red MN

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used red MN

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young tractor

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SVcummins

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Angle Iron

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SVcummins

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DoubleO7

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