Buick v6 identification

Here are the photos of my distributor lobes. I can't really tell but they do not appear even so does that mean I have an odd fire?

 

3-Long flat lobes and 3 shorter ones = Odd Fire........fires at 90-150 degrees
6-equal lobes = Even Fire..........fires 120 degrees

 

Here is a crude diagram of my distributor's cams (or lobes). The high points are exaggerated for the illustration but note that they are all evenly spaced apart and three of the high points are clearly wider than the other three. From what I'm hearing, this is an odd fire 231 V6. Can someone second this before it goes to a vote????

 

The lobes you have drawn are for ODD-FIRE and the 1254083 translates to 1977 231 OF as stated above. (as well as others)

 

Thank you everyone! I never would have figured it out without you!

 

Unless the engine came from a marine or industrial application you can bet if the engine has a points distributor it's an oddfire since GM used HEI in pretty much all the passenger vehicle 231's from it's common use in '75 and newer. I'd say someone probably installed a 225 distributor in a 231. Mid '77 is when the change from odd to evenfire happened. I've owned both even and oddfire '77 engines.
Check and see if your distributor cap has a metal tab that slides up to open up a "window" to adjust the points. If it does it should be a Delco distributor (a good thing). If not then a Prestolite distributor. This important for ordering correct tuneup parts like points, cap, rotor, etc.

 

At first I thought that was a cast iron body, but I don't remember my Prestolite having the centrifugal weights on top like that. It must be a Delco unit.

 

His post #13 shows a Delco cap and a picture in post #21 shows a breaker plate with a Delco part number. Looking at all those pic's, it looks like that distributor has a lot of wear.

 

My CRT Performance HEI arrives today. The rush was that I ordered it thinking I had a Dauntless but then started to figure out that I didn't. Thankfully, the HEI I ordered works on the 231 odd fire also!

 

And in less than 12 hours, whatever distributor that is will be thrown in the garbage and never spoken of again!