[bobzdar]

The rear discs on my car came from an open 2.73 10 bolt rear. Not sure what it came from, but it had the pontiac yoke on it, so I'm guessing it was a formula...

That is a gorgeous car. How much? I'd really like to find a late formula like that for a cruiser, probably wouldn't even swap out the 301...

[midyear]

Originally Posted by 74 SD455 Formula

Not to argue with you,but was'nt the Posi part of the WS6 option which was manditory on the "Z" coded cars ( T/A & Formula )along with the 4spd and 4 wheel disc brake set up and 8in Snowflake's.

I guess not on a formula. I have 2 79 Z code formulas, one has G80 posi, one does not. I have PHS on both, one PHS shows posi, one PHS does not. one without also did not came with a tach? go figure, U17 ip tach was an still an option...t-top car with quite a few options too.

[GT182]

Not to ruffle anyone's feathers but.... when I ordered my 79 Formula, I was told by the dealer that the WS6 option only came with 4 wheels discs, 15x8 snowflakes and a posi rear. IIRC my rear was a 3.48 or 3.23 posi... something like that. The gear ratio was the only option in the WS6 package. Dealer was Hutchinson Pontiac Sales in Rouses Point, NY.

[bobzdar]

I think ws6 came with 4 wheel discs and posi. However, both were also available separately on the formula along with apparently the ws7 option which was ws6 without the rear discs. So, you could technically order just about every combination of with/without 15x8 rims, discs and posi rear, except I don't think there was any way to get 15x8 rims without posi.

[lester]

In 78 WS6 cars didn't get rear disc brakes

and in 79 GM ran out of disc brake rear ends, and it was called a WS7 package

[midyear]

Originally Posted by GT182

Not to ruffle anyone's feathers but.... when I ordered my 79 Formula, I was told by the dealer that the WS6 option only came with 4 wheels discs, 15x8 snowflakes and a posi rear. IIRC my rear was a 3.48 or 3.23 posi... something like that. The gear ratio was the only option in the WS6 package. Dealer was Hutchinson Pontiac Sales in Rouses Point, NY.

I always love the post were someone says "I was told" .....OK then...here you go..PHS options from both cars...you be the judge...fluke, maybe? very possible, but these cars were far from perfect, awhile back I had a Z code 79 TA made 1-2-79 (van nuys car) that had the pass quarter installed almost 3/4 of an inch further back then the drivers side...

[The Boss]

Here's mine, has the G80 Limited slip....wish it had the removable roof hatches too!

[1973T/A]

Originally Posted by 2manyT/A'S

We need to know what transmission is in the car in order to answer that question.

1979 T/A with 301/4 speed came with a super LOW 1st gear.(3.44)

MOST other 4 speeds in Trans ams were 2:64 or 2:88.

The 3:44 low gear made the 301 pull like a 200 hp 400 in first & second,then you had a BIG rpm drop going into 3rd & fell right out of the power band.

It's almost like a 5 speed with no 3rd gear.

The Saginaw likely had a 3:00 1st,so it wouldn't pull NEAR as hard.

If it's a NICE car & affordable,just go BUY IT. (clutch pedals in 79-81's are FEW & FAR between!)

This is exActly right I have 79 4 speed 301 car and there geared low from first and second are surpisingly quick and once u hit third there dogs. My car is Borg warner tranny. But I spun a bearing on the 301 and pulled and put in a 455. This is my opinion but the 301 has to be the worst Pontiac V8 made JMHO.

Pax