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Forum: 70-72 GTO Tempest & LeMans TECH 03-23-2024, 12:07 PM
Replies: 3
Views: 229
Posted By pontiacmark
Found a good replacement.

Found a good replacement.
Forum: 70-72 GTO Tempest & LeMans TECH 03-16-2024, 10:38 AM
Replies: 3
Views: 229
Posted By pontiacmark
Fan shroud repair, what type of plastic

My 70 fan shroud has a large crack. Does anyone know the type of plastic? Trying to make the best repair.
Forum: Pontiac - Street 03-02-2024, 04:15 PM
Replies: 9
Views: 420
Posted By pontiacmark
Thanks all. Had to stop for the day. Will apply...

Thanks all. Had to stop for the day. Will apply more load and check again.
Forum: Pontiac - Street 03-02-2024, 01:34 PM
Replies: 9
Views: 420
Posted By pontiacmark
Slight improvement in clarity using wrench to...

Slight improvement in clarity using wrench to turn carrier while loading axle.
Forum: Pontiac - Street 03-02-2024, 01:21 PM
Replies: 9
Views: 420
Posted By pontiacmark
Used gears and used pinion bearings. Preload is...

Used gears and used pinion bearings. Preload is 17 lbf-in
Forum: Pontiac - Street 03-02-2024, 01:06 PM
Replies: 9
Views: 420
Posted By pontiacmark
Much better. Backlash was on the high side at...

Much better. Backlash was on the high side at 0.009"
Forum: Pontiac - Street 03-02-2024, 12:32 PM
Replies: 9
Views: 420
Posted By pontiacmark
Couple more pictures. It's probably something...

Couple more pictures. It's probably something basic I am missing....
Forum: Pontiac - Street 03-02-2024, 12:24 PM
Replies: 9
Views: 420
Posted By pontiacmark
8.2 rear contact pattern

1st time setting one up. Original 3.23 GM gear on Auburn limited slip. Coated teeth but cannot see the contact pattern clearly on the coated teeth. The grease transfers to the other teeth and it...
Forum: 70-72 GTO Tempest & LeMans TECH 11-18-2023, 08:14 PM
Replies: 1
Views: 426
Posted By pontiacmark
Sorry the reply is a little late. Just putting...

Sorry the reply is a little late. Just putting the wiring harness in mine. It goes over the brake booster.
Forum: 70-72 GTO Tempest & LeMans TECH 08-30-2023, 06:24 PM
Replies: 1
Views: 304
Posted By pontiacmark
RARE D port manifolds and Pypes Exhaust

Posted in Exhaust tech but no response yet. Just about ready to order exhaust for my 70 GTO. I have the 2 1/2” oversized D port Ram Air manifolds from Ram Air Restorations. Looking at our host, PYPES...
Forum: Exhaust TECH 08-27-2023, 08:54 PM
Replies: 0
Views: 522
Posted By pontiacmark
Question Pypes exhaust for 70 GTO with RARE manifolds

Just about ready to order exhaust for my 70 GTO. I have the 2 1/2” oversized D port Ram Air manifolds. Looking at our host, PYPES direct, and Summit for the right kit. I like the sound of the Street...
Forum: Pontiac - Street 08-21-2023, 10:35 AM
Replies: 10
Views: 581
Posted By pontiacmark
Strange to me too. Even if it's net zero Cc with...

Strange to me too. Even if it's net zero Cc with the valve reliefs, it will be over 10:1 with 96cc heads. If he mills the domes off, still will have to rebalance. Might as welll suck it up and bore...
Forum: Pontiac - Street 08-21-2023, 10:32 AM
Replies: 10
Views: 581
Posted By pontiacmark
Unfortunately, they are out of business.

Unfortunately, they are out of business.
Forum: Pontiac - Street 08-19-2023, 09:47 PM
Replies: 10
Views: 581
Posted By pontiacmark
Thanks. I know domes are problematic and can...

Thanks. I know domes are problematic and can cause detonation even with big chambers. He may have to suck it up and go through the whole motor.
Forum: Pontiac - Street 08-19-2023, 07:50 PM
Replies: 10
Views: 581
Posted By pontiacmark
Venolia domed piston info

Friend just picked up a 64 GTO with a 72 455, 7L4 heads, unknown HFT cam. It ran ok but he is going through the whole car. We pulled the heads off today and found the pistons were dome type Venolia....
Forum: Pontiac - Street 08-08-2023, 10:06 AM
Replies: 82
Views: 6,834
Posted By pontiacmark
Paul just got back to me and they offer the...

Paul just got back to me and they offer the hardware set.
Forum: Pontiac - Street 08-08-2023, 07:23 AM
Replies: 82
Views: 6,834
Posted By pontiacmark
What year bolt set from Ames? I got the 70 GTO...

What year bolt set from Ames? I got the 70 GTO kit not thinking it might be different and of course it doesn't work.
Forum: Pontiac - Street 08-08-2023, 06:54 AM
Replies: 82
Views: 6,834
Posted By pontiacmark
Ordered my oversize D ports from RARE shown as in...

Ordered my oversize D ports from RARE shown as in stock in Mid May. Website states allow 2 weeks for delivery. Received in early July. From my understanding, Paul is on his 3rd casting supplier and...
Forum: National Events 07-24-2023, 12:39 PM
Replies: 10
Views: 2,326
Posted By pontiacmark
Ah, June for GTOAA. That's better. 2 hours sleep...

Ah, June for GTOAA. That's better. 2 hours sleep last night means I read worse than usual.
Forum: National Events 07-24-2023, 07:51 AM
Replies: 10
Views: 2,326
Posted By pontiacmark
So, let me get this straight- Norwalk Ames...

So, let me get this straight-
Norwalk Ames Pontiac Nationals, 7/18/24-7/20/24
POCI Convention 7/15/20-7/20/24
GTOAA 7/18/24-7/22/24
It was bad enough having POCI and GTOAA overlap this year. You...
Forum: Pontiac - Street 06-23-2023, 10:51 AM
Replies: 6
Views: 432
Posted By pontiacmark
https://www.summitracing.com/parts/mcl-75221 ...

https://www.summitracing.com/parts/mcl-75221
Looks reasonable.
Forum: Pontiac - Street 06-23-2023, 06:41 AM
Replies: 6
Views: 432
Posted By pontiacmark
Question Clutch and pressure plate recommendation?

Just finished the rebuild of a stock 400 to a built 461 stroker. Figure about 425 hp and 500 lbf-ft. When the trans was installed, a stock replacement Sachs clutch and pressure plate were installed....
Forum: National Events 06-23-2023, 06:33 AM
Replies: 27
Views: 7,338
Posted By pontiacmark
I will be there all week working the show. My son...

I will be there all week working the show. My son and I will be the ones taking the picture after tech check in. Let me know if y’all have any last minute questions.
Forum: THE LOBBY 06-02-2023, 06:44 AM
Replies: 162
Views: 19,014
Posted By pontiacmark
I ordered my oversized D ports on 5/16. He said...

I ordered my oversized D ports on 5/16. He said allow 3 weeks for shipping. If they look like the pictures in post #137 I will be very disappointed, especially with the price I paid. I will post...
Forum: Pontiac - Street 05-29-2023, 10:14 AM
Replies: 19
Views: 1,090
Posted By pontiacmark
Unfortunately, the engine is completely assembled.

Unfortunately, the engine is completely assembled.
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