new guy with no car
 

hey all new guy from Sarasota Fl.
currently have no GM products but you never no what may turn up.
not to say I have never owned a chevy, I have had so many I don.t think I can count them all. I like to think I have a pretty good knowledge of chevy's from 1962 to 71 with emphasis engine and transmission.
now I am curious did many chevelles come equipped with 12 bolt rears in 1972. I am guessing only Big Block 4 speed cars if any?
thanks.

Actually, quite a few had them in 72'. My car was originally a 350 2bbl/th350 car and had a factory 2.73 non posi 12 bolt. I would say mostly 6 cylinder and 307 cars had 10 bolts. My 72' Monte was a 350 4bbl and had a 2.73 posi rear factory as well. Every factory big block car I have ever seen had a 12 bolt rear axle from the factory.

Welcome from Ga .

Welcome 68Custom, Michigan here. The land of the never ending snow. lol

So what are you currently driving ?

I forgot to say we welcome ALL cars .

Welcome to the site. Not all SS-optioned Chevelles came with a 12-bolt rear end. The SS Equipment option was available with any optional V8 engine in 1972. The L65 350-2bbl engine came standard with a 10-bolt rear end and only equipped with a 12-bolt rear end when the trailer option (RPO YD1) was ordered. The other 3 optional V8 engines (L48, LS3, and LS5) were outfitted with 12-bolt rear ends so when one of those engines was ordered along with the SS Equipment option a 12-bolt rear end was used. Positraction was still an option; an open rear end was standard. However, a 12-bolt rear end, as well as Positraction, was available on non-SS-optioned Chevelles as well so the presence of a 12-bolt (with or without Positraction) is not an indication of a 1972 SS-optioned Chevelle.

I guess lots of chevelles still had the 12 bolt for 72, seems like a 12 bolt is rare as factory equipment in Novas, Camaros and full size by 72?

In 71' GM swapped to 8.5 10 bolts in the Camaro and Nova car lines. Not sure why they did that and left the 12 bolt in the Chevelles.

now days I am driving a couple of Jap cars, very reliable but not as fun as hearing dual exhaust.

Welcome from port charlotte