This is a somewhat technical question, so I thought it best if asked in this section.

On a 1964 Chevelle, in order to get the 327/300hp, would the car have to be an SS ?
In other words, could a Malibu be ordered with a 327/300hp ?


Nate

I'm not completely sure, but I think only the 250 hp 327 could be had in the model year 64. Maybe RichL79 will drop in here and give us better info.

Both the 250hp and 300hp 327s were available in the 1964 model year (they were added late in the year). You could get either one in any '64 Chevelle, it did not have to be an SS.

Thanks Rich.

ok
good
thanks Rich.

Nate

As a side note, 327s in '64s were really rare since they weren't added to the option list until about April of 1964. I think less than 5000 327-powered '64s were built. So that means any '64 with a 300hp 327 would be even more rare.

I wish I had the exact facts and figures to post, but I'm at work and my data is at home.

I've got that production information.
My source indicates the L30 327 entered production 3-64 and there were 6,598 built. The L74 327 Hi Performance engine entered production 6-64 with 1,737 built. So the 300HP engine could have only been installed in a 64 Chevelle built during June or July. 64 production ended at the end of July.
Bruce

Thanks for the production figures, it looks like my memory was off by a bit. The numbers do show that the 300hp cars are quite rare (the 300hp engines were FINALLY approved when the GTO sales took off).

I have a 64 SS convert. that was suposed to be a 327 car, but to my understanding all the 327 cars had a 12 bolt rear, am I correct in assuming this, mine has a 10 bolt. The ID plate only shows a V8 and makes no refference to motor size.

Bob Hauk
Celina, Texas

The 12 bolt Rearend was not Available till 65.
Mike

The 12 bolt Rearend was not Available till 65.
Mike

What about early 65s?

I would like to know if there is a way to know if my car is a 327 originally, as a 4 speed, factory air SS convertible having a 327 motor would make it real rare. All other parts, rear end, 4 speed trans, ect. are all #'s correct. I bought it in original condition (no motor) with only 80k miles and am finishing a complete frame up resto.

Bob Hauk

In '64 all 4-speeds were the early Muncies and all differentials were 10-bolts. This was true whether a 283 2 or 4-barrel, a 327-250 or a 327-300.

In '65 again all 4-speeds were Muncies, but the 12-bolt made it's debut. In '65 as I understand it, Chevrolet was very liberal with the 12-bolt rear and seemingly installed it behind all 327s regardlest of horsepower or transmission (Geez, where was it when they wanted to drop the 327-365 horse L76 into the '64?).

For '66 the 12-bolt was not used behind the 327s (unless you count the Loch Ness Monster of Chevelle-dom, the rumored L79). In 67/68 the 327s used 10-bolts unless a factory 4-speed was ordered, or if it was an L79 car. By '66 the 283s & L30 327 used the new Saginaw for a 4-speed. L79s used the stronger Muncie.


One more thing, generally the 283s used a 10" clutch, but factory 4-speed 283s got the stronger 10.4" centrifically-assisted clutch from the 327. I'm not sure which years (1967 for sure) but an 11" clutch was offered on any small block somewhere within that time frame.