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Old 07-28-2010, 06:34 PM
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Looking for info on GM 307 engine stamp code UF???

Hello fellow hotrodders!

I'm looking for some info on GM engine block code UF? I havre traced it down online to be from a 1969 307. My dilemma is I need to obtain a replacement oil pan for the engine but it has a passenger side dip stick. Every pan I have been able to track down is a drivers side dip stick. Newer pans from 305/350 engines will not bolt up either. If anyone has any info on what I have here or some suggestions please post.

Thanks in advance everyone for your input.

Joe

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Old 07-28-2010, 09:29 PM
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Try www.73-87.com, millions of sufix codes.
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Old 07-28-2010, 09:55 PM
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Quote:
Originally Posted by z06_joe
Hello fellow hotrodders!

I'm looking for some info on GM engine block code UF? I havre traced it down online to be from a 1969 307. My dilemma is I need to obtain a replacement oil pan for the engine but it has a passenger side dip stick. Every pan I have been able to track down is a drivers side dip stick. Newer pans from 305/350 engines will not bolt up either. If anyone has any info on what I have here or some suggestions please post.

Thanks in advance everyone for your input.

Joe
UF '69 307 Truck 200 L-14 TH400 2-Brl 4-WD

If you have a 307, the dipstick should be on the driver side. There are also several "UF" suffix's that are for 327's- but they too, would have driver side dipsticks.

If you have a passenger side dipstick, you may have a counterfeited suffix for duping someone into thinking the engine was a 307 when it was something else- who knows. Double check both the dipstick placement and the suffix.

What is the casting code and date code- both located on the block ledge behind where the distributor sits.
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Old 07-28-2010, 10:57 PM
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Might be a rebuilt 307 with a later pan. Late 70's-thru 80's pans will work with the right end (pan) seals.
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Old 07-29-2010, 12:35 AM
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The thing is, the block itself has the hole for the dipstick and the "bulge" cast into it.

If you put the wrong type pan on the engine there will be a hole where the pan bulges but the block doesn't. And w/the wrong pan there's no way for the dipstick to pass into the pan itself.

Shown is an aftermarket block w/driver side stick. It looks much as an OEM block does, in regards to the pan rails:

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Old 07-29-2010, 03:37 AM
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Last I remember, passenger side dipsticks had the tube in the pan.

edit: I stand corrected. Just saw the pass. side dipstick through the block. But I'm sure I'm not the only one who saw a dipstick tube in the oil pan (pass. side). I had a '79 Cutlass w/a 305 sbc with a dipstick tube in the oil pan. Still looking for a pic of it...

Last edited by a1supersport; 07-29-2010 at 03:54 AM.
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Old 07-29-2010, 05:25 AM
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Quote:
Originally Posted by a1supersport
But I'm sure I'm not the only one who saw a dipstick tube in the oil pan (pass. side). I had a '79 Cutlass w/a 305 sbc with a dipstick tube in the oil pan. Still looking for a pic of it...
Common w/the BBC.

Also the SBC block casting number for a dip-in-pan block is:

366245 350 '78-'79 Pass, Malibu, Camaro, Nova. May well be others. On some lists that c/n shows up as a high-tin bow tie casting but that may be in error or the same casting was used for both, possibly.
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Old 07-29-2010, 04:29 PM
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Quote:
Originally Posted by cobalt327
Common w/the BBC.

Also the SBC block casting number for a dip-in-pan block is:

366245 350 '78-'79 Pass, Malibu, Camaro, Nova. May well be others. On some lists that c/n shows up as a high-tin bow tie casting but that may be in error or the same casting was used for both, possibly.
Yeah the BBC I've seen. I'm glad you found that info on the dip-in-pan sbc. Thought about that a lot today...almost came to the conclusion that I was either seeing things...or losing my marbles. Now you got me thinking. I don't recall checking if that engine was a 305 (in the cutlass)...I just assumed.
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