What is the smallest V8 that would have had these installed from the factory? Could a 327 RS have a 12 bolt posi and multi leafs? Thanks.

my 1968 RS has the original 12 bolt rearend, and the original multi leafs on it, so some had to have these options available. Not sure about the posi though as mine was an open diff. But i am pretty sure the buyer could order the posi as an option.
Hope this helps,
Kyle

My very first car was a 68 Camaro,327/275 horse with a 4 speed,wide ratio Saginaw and 3.08 12 bolt open rear,multi leaf springs.I bought it in 1972,so it hadn't been molested.

With a Muncie Transmission, the smallest engine it could be is a 350/295HP L48 engine. In otherwords an SS. All other lower performance engines used Saginaws. 12 bolts were driven by the drive train option, you could not order a 12 bolt. You could however order Posi. Which axle you got, 12 bolt or 10 bolt depended on the rest of the package.

What about the L30/M20 cars? I thought that they had 12 bolts in them.

The L30/M20's did get a 12-bolt...

The L30/M20 Camaro was the only regular production 1967-68 Camaro outside of the SS/Z28 models to receive the heavy-duty "12-bolt" rear-end, right-side radius rod (in 1967), and multi-leaf rear springs (in 1968), as well as additional performance equipment otherwise exclusive to the SS or Z28 lines. See: http://www.camaros.org/l30m20.shtml

So to answer DTB's original question, yes if that RS was ordered with RPO's L30 & M20, it would be a 275HP 327 V8, with Muncie M20 and 12-bolt Posi w/ Multi-leafs.

There are no L30/M20 cars in 69. LM1/M20s got a 12 bolt, but got a Saginaw transmission.

L30/M20's in 67 and 68 got a Saginaw transmission. Why do you think people ask which side of the steering column the speedometer cable comes thru the firewall, when trying to figure out if a car is an SS or L30/M20 car?

All 4 speeds are identified by the RPO M20 in the AIM. M20's were available in SS's and above. M21 was only available in Z28's and L34's and above, M22 only available in Z28, L78/L89 and COPOs. But these are just model numbers of the Muncie transmission. They all fall under the global M20 RPO number.

Read the rest of the L30/M20 article closer at the CRG site. The L30/M20 Camaro
327ci-275HP, 4-speed (base V8 price + $331.00 in 1968, with N10 dual exhaust & PY5 F70x14 tires)
While the L48 package got top billing, the less-publicized optional upgrade to the base 327 engine, RPO L30, boosted performance of the base 327ci V8 from 210HP to 275HP. When the L30 engine was combined with the M20 4-speed manual transmission, and only in this case, Chevrolet considered the L30 engine to have crossed the line into high-performance territory, and added three of the seven SS high-performance components: the rear axle, rear springs (or radius rod in 67), and rear brake proportioning valve. In addition, two of the remaining four SS components could be added via RPO choices, resulting in similar matches to the first five of the seven SS-350 performance component categories. Another difference was that when the M20 transmission was ordered on the SS-350, a different part was supplied, the higher-quality Muncie 4-speed instead of the Saginaw 4-speed - more below .

L30/M20 Components That Could NOT Be Factory Upgraded: Clutch and Transmission
The L30/M20 was outfitted with the same 10.4-inch diameter standard clutch as used on the Z28. The larger 11.0-inch clutch used on the SS could not be separately ordered. However, the standard 10.4-inch clutch in the L30/M20, with its lower pedal force, was arguably preferrable to the SS clutch.
The L30/M20 was supplied with an upgraded Saginaw 4-speed transmission, instead of the Muncie transmission that came with the SS-350. This could not be changed at the factory.

Besides the clutch the other significant difference between the L48 and L30/M20 was the M20 transmission. M20 was not the name of the transmission but rather was the functional designation for any standard ratio 4-speed manually-shifted transmission. Unfortunately, Chevrolet yoked the 1967-68 L30 to the less-than-desirable cast-iron-bodied Saginaw 4-speed, heavier by some 14 lbs than the higher-quality aluminum-bodied Muncie 4-speed11 that was placed behind the L48

Mark:

DTB is asking about a 1968 Camaro, not 1969. ;)

I know that, second paragraph above. Just covering the bases.

Here's the answer for the third time:

The smallest 68 engine you can get a MUNCIE transmission, and a 12 Bolt rear axle is a 295HP/350ci L48 engine. In other words a 350 SS.

I need to reread that I guess. tongue.gif

Great info guys. I was thinking about buying this wrecked car that had it's front clip removed because it was damaged. I didn't have a lot of time to view it initially, but in the few minutes I had this is What I saw,(like a bonehead I got the trim tag info but didn't get the VIN graemlins/clonk.gif )

1968 original RS(key signs, original fenders were RS, The front park lamps had 3 wires(aftermarket 2), The stainless molding on doors and quarters, and the back up lamps openings were factory stamped, plus all the holes were there for the RS rocker molding.. It had original disk brakes up front with the proportioning valve under the drivers seat. A four speed muncie and a chevy 12 bolt(he said it was a posi). The multi leaf springs didn't look quite right, at the rear end of each spring they had a flat ear that extended a little beyond the main end of the spring. Kind of like a flat finger that extended out a little further than the main body. Original fold down back seat in houndstooth(very nice). Here's the trim tag

11C I281
68 12437 LOS 12647
749 V2

The car had a salvage title. But it did have some nice parts. The car broadsided another and the frame didn't look twisted but both doors were buckled. He must have sold it or changed his mind because he's got his machine on and doesn't return calls. Todd