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Search took 0.10 seconds. Search: Posts Made By: Rocky Rotella
Forum: Pontiac - Street 02-07-2023, 12:19 PM
Replies: 58
Views: 2,910
Posted By Rocky Rotella
Unlike HEI, GM only used a handful of different...

Unlike HEI, GM only used a handful of different weights for points distributors. The center cam (which is welded to the main shaft) and springs controlled the rate. The limiting pin and its...
Forum: Pontiac - Street 01-31-2023, 10:51 PM
Replies: 19
Views: 948
Posted By Rocky Rotella
BG 44K has worked great for us!

BG 44K has worked great for us!
Forum: 70-73 Firebird & TA TECH 01-07-2023, 11:27 PM
Replies: 31
Views: 2,574
Posted By Rocky Rotella
Just saw this. I see we're all in...

Just saw this.

I see we're all in agreement. Unfortunately, lots of questionable areas on this car.
Forum: 70-73 Firebird & TA TECH 12-07-2022, 10:27 PM
Replies: 14
Views: 610
Posted By Rocky Rotella
This will explain most everything needed to know...

This will explain most everything needed to know about 4X heads.

https://www.motortrend.com/how-to/0312pon-4x-6x-racing-heads/
Forum: 70-73 Firebird & TA TECH 11-30-2022, 10:21 AM
Replies: 5,622
Views: 527,984
Posted By Rocky Rotella
Unfortunately, the two cars in the article above...

Unfortunately, the two cars in the article above are neither of those whose VINs we know today. The timelines just don't workout.

The article above is from the October 1972 issue of Motor Trend...
Forum: 68-69 GTO Tempest & LeMans TECH 10-18-2022, 11:16 AM
Replies: 11
Views: 837
Posted By Rocky Rotella
Unfortunately, on production balancers there were...

Unfortunately, on production balancers there were no stampings to identify them. A purple paint swath was added to to the RA II/IV balancer during production, which was painted over during engine...
Forum: 74-76 Firebird & TA TECH 05-06-2022, 04:48 PM
Replies: 2
Views: 1,102
Posted By Rocky Rotella
That appears to be correctly identified. While...

That appears to be correctly identified. While the 2bbl air cleaner assembly itself has little value, the other parts on it and with it may be desirable to others with a 4bbl engine.
Forum: Pontiac - Street 03-14-2022, 09:17 AM
Replies: 17
Views: 1,543
Posted By Rocky Rotella
If you plan on reusing the crankshaft in the...

If you plan on reusing the crankshaft in the engine, I strongly suggest having it mag tested to make sure it's crack-free. Generally speaking, if a balancer isn't torqued properly (particularly to...
Forum: 70-73 Firebird & TA TECH 01-13-2022, 06:35 PM
Replies: 10
Views: 1,463
Posted By Rocky Rotella
In addition to the great advice above, it's worth...

In addition to the great advice above, it's worth noting that the d-port cars with log-type exhaust manifolds (regardless of displacement--350 to 455) had 2-inch diameter head pipes. The over-axle...
Forum: 70-73 Firebird & TA TECH 12-21-2021, 12:24 PM
Replies: 35
Views: 5,284
Posted By Rocky Rotella
Unfortunately, I don't have that answer, but I'm...

Unfortunately, I don't have that answer, but I'm pretty certain that it wasn't a production vehicle. I'd guess that it was an engineering mule or pilot vehicle used for press events.
Forum: 70-73 Firebird & TA TECH 12-20-2021, 11:55 AM
Replies: 35
Views: 5,284
Posted By Rocky Rotella
This car has intrigued me for years and I have...

This car has intrigued me for years and I have been following the history of this car very closely for some time. I can say with absolute certainty that it was indeed a test bed for Pontiac’s SD-455....
Forum: 70-73 Firebird & TA TECH 11-27-2021, 12:03 PM
Replies: 8
Views: 907
Posted By Rocky Rotella
Just to point out to those that may not have the...

Just to point out to those that may not have the book, the actual blueprints for the blue stripes (for white car) notes that the stripe color is to match Tyrol Blue and it includes instructions that...
Forum: THE LOBBY 11-19-2021, 09:10 AM
Replies: 33
Views: 4,790
Posted By Rocky Rotella
Notice that it was up for bid and sold to that...

Notice that it was up for bid and sold to that dealer for the bid price of $2,300? At an invoice cost of half, that likely indicates lots of miles or some type of heavy use or damage while it was...
Forum: THE LOBBY 11-06-2021, 10:24 AM
Replies: 32
Views: 5,176
Posted By Rocky Rotella
I can’t speak to the past owner(s) being a forum...

I can’t speak to the past owner(s) being a forum member, but our own Tom Hand reproduced the VOE mufflers that helped drive the selling price to the stratosphere!
Forum: 70-73 Firebird & TA TECH 09-16-2021, 05:13 PM
Replies: 52
Views: 8,964
Posted By Rocky Rotella
The guy Thomas got the SR engine from went to...

The guy Thomas got the SR engine from went to high school with Nunzi...

Hmmm, Nunzi was 18 years old when he came to America in 1958 and went right to work!
Forum: 70-73 Firebird & TA TECH 09-05-2021, 09:30 PM
Replies: 32
Views: 8,163
Posted By Rocky Rotella
Agreeing with what’s been previously posted,...

Agreeing with what’s been previously posted, according to internal Pontiac literature the L67 Ram Air IV was (preliminarily) planned as an optional engine for the Formula and Trans Am. It was,...
Forum: West 08-27-2021, 10:24 PM
Replies: 9
Views: 6,110
Posted By Rocky Rotella
The Omaha metro area is deceiving in size. The...

The Omaha metro area is deceiving in size. The counties comprising the metro area (including the Iowa side), we're right at a million people. And the Lincoln metro (about 35 minutes away) adds...
Forum: Pontiac - Street 05-12-2021, 03:43 PM
Replies: 2
Views: 957
Posted By Rocky Rotella
TH-400 Factory Calibration Chart

I'm trying to determine factory calibrations for various Turbo-400 automatic transmissions and am looking for a chart or document generated by GM, Hydra-matic, or one of the Divisions.

Pete...
Forum: 70-73 Firebird & TA TECH 05-08-2021, 10:43 AM
Replies: 13
Views: 2,185
Posted By Rocky Rotella
Here are a couple of photos from a low-mile 1974...

Here are a couple of photos from a low-mile 1974 Firebird and low-mile 1979 Firebird that are solid.

The number of wood-grained instrument clusters GM had to inventory at the assembly plant had to...
Forum: 74-76 Firebird & TA TECH 05-03-2021, 07:57 PM
Replies: 61
Views: 8,796
Posted By Rocky Rotella
After years of searching, I finally found one! ...

After years of searching, I finally found one! And I must admit that if there was a ‘74 Formula that’s perfect for me, this is it!
Forum: 74-76 Firebird & TA TECH 05-03-2021, 03:47 PM
Replies: 61
Views: 8,796
Posted By Rocky Rotella
In reviving this nearly-five-year-old post, I'm...

In reviving this nearly-five-year-old post, I'm excited to say that as of this past weekend the amazingly-original Formula has a new home!
Forum: THE LOBBY 04-21-2021, 02:52 PM
Replies: 21
Views: 6,418
Posted By Rocky Rotella
Do any old timers remember the story about Nunzi...

Do any old timers remember the story about Nunzi serving hot dogs and beans to his dinner guest?!
Forum: Pontiac - Race 04-14-2021, 12:19 PM
Replies: 44
Views: 7,901
Posted By Rocky Rotella
In this link it shows GM-274-M superseding...

In this link it shows GM-274-M superseding GM-232-M.
...
Forum: Pontiac - Race 04-14-2021, 11:44 AM
Replies: 44
Views: 7,901
Posted By Rocky Rotella
I'm sure that GM's specifications are proprietary...

I'm sure that GM's specifications are proprietary so total metallurgic breakdown available to hobbyists. It does look like there may be some historical information available for a price. You'll see...
Forum: Pontiac - Race 04-13-2021, 04:45 PM
Replies: 44
Views: 7,901
Posted By Rocky Rotella
From what I've been able to determine through...

From what I've been able to determine through research, Pontiac cast its blocks and heads of GM-232-M iron. A quick google search shows it's registered as "gray iron," but I've been unable to...
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