196 or 231 ci Buick?

Later today I am going to look at a 1979 Buick Regal for the purpose of getting the v-6 engine for my 1961 cj 5.
In research I see that the regal could have a 196 c.i or the 231 c.i. even fire.
How do I tell the difference in looking at the engine?
Need a quick response please.

 

There's a page on casting numbers in the Tech library - http://www.earlycj5.com/technical/e...bers-internal-specs-for-most-years-and-notes/

Won't tell you it's a 196, but it would rule-in a 231.

 

If it's still intact look at the emissions decal on the core support or under side of the hood. Rarely but sometimes they are on the inner fender well.
If it says engine family 3.8L then it's a 231, if 4.1L then a 252. Either are great donors. Obviously if smaller liter displacement then a smaller engine.

 

Thanks for the info. I have pulled all the numbers and will look for the emissions decal.
Seller delayed, going to look today Wed., will let you know.

 

Drove 60 miles to look at the car. The seller originally said it was a V- 4 ., which only means he didn't have a clue.
Turned out to be a V-8 (4.9).
I thank you all for great advice and quick response.