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Forum: Pontiac - Street 01-14-2025, 07:13 PM
Replies: 12
Views: 496
Posted By steve25
Here’s what I figure. I am assuming your 670...

Here’s what I figure.

I am assuming your 670 heads have had a valve job and are at 76 CCs

Here’s the numbers which are all in CCs
Bore. 831 CCs

Chambers 76

Valve notch 6.7
Forum: Pontiac - Street 01-14-2025, 11:26 AM
Replies: 50
Views: 1,093
Posted By tom s
I NEVER put coolant in a new engine.Plain water...

I NEVER put coolant in a new engine.Plain water until I know there is no leaks.After distilled water and a bottle of water wetter.FWIW,Tom
Forum: Pontiac - Street 01-13-2025, 01:28 PM
Replies: 17
Views: 842
Posted By Jay S
Thanks, that is correct. Needed my cup of...

Thanks, that is correct. Needed my cup of coffee. IRC…It takes the lighter spring to cure surging on the qjet and AFB, and a lower number on a holley.
Forum: Pontiac - Street 01-13-2025, 12:41 PM
Replies: 17
Views: 842
Posted By Kenth
If you need fuel sooner you´ll need stronger...

If you need fuel sooner you´ll need stronger springs for Q-jets and Carter AFB´s.
Holley PV´s with higher numbers has stronger springs than lower #´s. for faster fuel delivery.
Forum: Pontiac - Street 01-11-2025, 06:08 PM
Replies: 27
Views: 1,627
Posted By b-man
Fix your floors and replace whatever...

Fix your floors and replace whatever weatherstripping needed to keep the water out.

You may need to remove and reseal the windshield and rear window, both common places for water to leak past and...
Forum: THE LOBBY 01-11-2025, 09:19 AM
Replies: 9
Views: 503
Posted By Half-Inch Stud
Thanks you all. My PMD hobby is on a cold back...

Thanks you all. My PMD hobby is on a cold back burner until i trip across a 455 assy.
Meanwhile Bowling, tube amplifiers, old beer cans, make a decent winter hobby.

Chicken are not happy with...
Forum: THE LOBBY 01-09-2025, 11:23 PM
Replies: 9
Views: 503
Posted By Half-Inch Stud
Wow, ignored the Thread until curiosity got me...

Wow, ignored the Thread until curiosity got me now....it's for me. Thanks.

You all know 60 is yhe new 49. Original joints and all.
Forum: THE LOBBY 01-09-2025, 12:59 AM
Replies: 41
Views: 2,162
Posted By turbo69bird
Only want to beat a dead horse but please no more...

Only want to beat a dead horse but please no more Ls motors in traditional Pontiacs. No one wants to see another LS swap .
Forum: Pontiac - Street 01-07-2025, 05:19 PM
Replies: 14
Views: 774
Posted By b-man
Regarding the 3” versus 3.25” main bearing speed,...

Regarding the 3” versus 3.25” main bearing speed, on a street engine and in many non-endurance race engines it’s pretty much a non-issue.
...
Forum: THE LOBBY 01-06-2025, 01:14 AM
Replies: 14
Views: 968
Posted By Skippy597
Marketplace score!

Hey, just wanted to share my awesome score from the weekend to some guys who might appreciate it. Got a complete 400 YC block with an old P4B intake and 3 tune headers on it, a bare 400 yd block,...
Forum: THE LOBBY 01-04-2025, 12:16 AM
Replies: 11
Views: 790
Posted By Jim Zeek
Arapaho's new caretaker

Many of you know Troy Tribby (60man) here on PY and his 60 Ventura Arapaho. A few months ago I posted that he moved into assisted living and his 69 Grand Prix dragcar was up for auction. It went to...
Forum: THE LOBBY 01-02-2025, 08:12 PM
Replies: 8
Views: 348
Posted By Green Elephant
New guy

Hello, I’m new to the forum. Current rides are a 1970 Grand Prix and two 1963 Grand Prix’s. I’m a machinist, welder and fabricator in the business aviation industry, been at it for about 35 years....
Forum: Industry Stuff 12-31-2024, 08:44 PM
Replies: 15
Views: 794
Posted By b-man
Cliff would likely have some, he ships out carb...

Cliff would likely have some, he ships out carb parts and kits pretty regularly.
Forum: Pontiac - Street 12-30-2024, 05:55 PM
Replies: 276
Views: 48,690
Posted By Elarson
As a matter of fact, Boss Bird clutch guy is...

As a matter of fact, Boss Bird clutch guy is here.
Dyno day is done. I'm sure Mike will publish results later.

Eric
Forum: Pontiac - Street 12-29-2024, 01:23 AM
Replies: 22
Views: 610
Posted By Jay S
Stock valve length and 68404 springs are hard to...

Stock valve length and 68404 springs are hard to beat with a RA 4 cam. Pretty simple combo.
Forum: THE LOBBY 12-28-2024, 08:06 AM
Replies: 12
Views: 778
Posted By Jeff Hamlin
Thumbs up https://live.staticflickr.com/65535/54231828454_d6...

https://live.staticflickr.com/65535/54231828454_d6c7b4f84f_c.jpg
Forum: Pontiac - Street 12-25-2024, 05:45 PM
Replies: 59
Views: 2,822
Posted By Dragncar
https://bulletcams.com/ Ask for Tim Goolsby.

https://bulletcams.com/

Ask for Tim Goolsby.
Forum: Pontiac - Street 12-24-2024, 12:21 PM
Replies: 25
Views: 963
Posted By SD455DJ
Dan checked remeasured the lobes...it is indeed...

Dan checked remeasured the lobes...it is indeed the Warrior 968 RAIV replacement cam as the picture that Mike just posted. Measured at .050" 231/239/113.5 with the correct foot on the micrometer...
Forum: Pontiac - Street 12-23-2024, 07:05 PM
Replies: 24
Views: 991
Posted By Schurkey
Seafoam, Marvel, GM Top Engine Cleaner, other...

Seafoam, Marvel, GM Top Engine Cleaner, other petroleum-based solvents will have the neighbors calling the Fire Department.

Pouring water down the carb produces no smoke.
Forum: Pontiac - Street 12-21-2024, 10:56 AM
Replies: 276
Views: 48,690
Posted By mgarblik
Yes, you did send me that information. It was...

Yes, you did send me that information. It was really interesting and cool to see how the SD-455 engine responded to the changes they made during development.

Agree, headers and a nice full...
Forum: Pontiac - Street 12-18-2024, 12:44 PM
Replies: 15
Views: 616
Posted By 'ol Pinion head
Core support out of alignment with hood will...

Core support out of alignment with hood will create the aggravation with the hood latch cable being stressed & eventually breaking. Have ran into it before! Big reason ive run across for the core...
Forum: Pontiac - Street 12-18-2024, 10:35 AM
Replies: 27
Views: 1,013
Posted By Jay S
Everything from SM is cheap entry level copies. ...

Everything from SM is cheap entry level copies. Metallurgy and quality varies. Go on E bay and buy a 40 year old HSD intake, it will be better than anything SM offers.
Forum: Pontiac - Street 12-18-2024, 09:27 AM
Replies: 27
Views: 1,013
Posted By jamaca85
you will get a lot of input here ..but unless you...

you will get a lot of input here ..but unless you are going to be making a lot of power . I would just get another cast iron intake. you can still get them for under 200.
Forum: Pontiac - Street 12-15-2024, 10:11 AM
Replies: 276
Views: 48,690
Posted By mgarblik
Bringing this thread back up after 5 months. I...

Bringing this thread back up after 5 months. I am sorry things are moving much more slowly than I had hoped. I promise it won't be another 40 years however! So what's been accomplished and what's...
Forum: Pontiac - Street 12-11-2024, 10:35 AM
Replies: 24
Views: 735
Posted By PAUL K
Good info but the exhaust is 230 @ .050 .... It...

Good info but the exhaust is 230 @ .050 .... It closes two degrees before TDC. It's the same exhaust lobe they used on their Blazer cam. Ironic Crane screwed around more than any company with their...
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