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Posts Made By:
grivera
Forum:
Pontiac - Street
05-19-2024, 08:12 AM
Replies:
15
Help Decipher CC HR Cam
Views:
777
Posted By
Cliff R
I used SD's Old Faithful cam 236/245/112 in my...
I used SD's Old Faithful cam 236/245/112 in my last 455 at 11.3 to 1 compression. It was pretty "tame" at idle making 13.5" vacuum at 750rpm's with only 10 degrees initial timing. Fine on pump gas...
Forum:
Pontiac - Street
05-16-2024, 05:12 PM
Replies:
16
Questions Re: Manual 4 Wheel Disc Brakes Conversion
Views:
297
Posted By
Formulajones
Corvettes we're built in The 10's of thousands...
Corvettes we're built in The 10's of thousands with 4 wheel manual disc brakes starting in 65 and continued the trend with manual into the mid 70's. Power was an option.
I did 4 wheel manual disc...
Forum:
Pontiac - Street
05-16-2024, 01:25 PM
Replies:
16
Questions Re: Manual 4 Wheel Disc Brakes Conversion
Views:
297
Posted By
65madgoat
7/8" master cylinder and go smaller (3/16") on...
7/8" master cylinder and go smaller (3/16") on brake line to the rear is my advice going manual. Manual works great when set up right.
Forum:
Pontiac - Street
05-16-2024, 01:23 PM
Replies:
16
Questions Re: Manual 4 Wheel Disc Brakes Conversion
Views:
297
Posted By
Scarebird
This is nonsense. A lot of factory cars...
This is nonsense.
A lot of factory cars had manual disc in the 60's till the mid 70's; Corvettes, Camaros, Firebirds, and especially Mustangs. I have hands-on converted several vehicles to...
Forum:
66-67 GTO Tempest & LeMans TECH
05-10-2024, 08:36 AM
Replies:
1
66 Lemans Coil Springs and Ride Height
Views:
140
Posted By
android 211
There was a guy who parted out Pontiacs a few...
There was a guy who parted out Pontiacs a few miles from my house. He sold me a set of coil springs that came off a 66 or 67 Lemans that still had the ID tags on them. The fronts said 'Moog HD' and...
Forum:
Interior TECH
05-06-2024, 02:56 PM
Replies:
7
eBay Seat Foam
Views:
369
Posted By
b-man
Bought some foam for my Le Mans convertible...
Bought some foam for my Le Mans convertible buckets from Ames a couple weeks ago. Ordered complete Legendary upholstery in Saddle at the same time, about an 8 month wait for that.
They have a...
Forum:
Pontiac - Street
05-06-2024, 09:20 AM
Replies:
11
Traded the 64 Lemans for a 66
Views:
357
Posted By
johnta1
Congrats! Good looking 66. :)
Congrats!
Good looking 66.
:)
Forum:
Interior TECH
05-06-2024, 01:18 AM
Replies:
7
eBay Seat Foam
Views:
369
Posted By
Entropy11
ACI for a sure thing quality/fit/feel. If I were...
ACI for a sure thing quality/fit/feel. If I were to gamble on any other set of foams it would be these (also USA made) : https://www.thorntonmusclecars.com/product-page/bucket-seat-foam-full-slot
...
Forum:
Pontiac - Street
05-03-2024, 02:30 PM
Replies:
19
What’s this 421 worth?
Views:
761
Posted By
steve25
I am trying to find my notes from 25 years ago ...
I am trying to find my notes from 25 years ago in regards to the valve to piston clearance deal, but here’s what I recall off of the top of my head.
Using 428 pistons in a 421 build with its...
Forum:
Pontiac - Street
05-03-2024, 01:36 PM
Replies:
19
What’s this 421 worth?
Views:
761
Posted By
b-man
Not really because the 421 block has a pretty...
Not really because the 421 block has a pretty robust casting compared to the 389s. However that much overbore kind of diminishes the value to a certain extent. When I bought my 421 it was standard...
Forum:
Pontiac - Street
05-03-2024, 12:10 PM
Replies:
19
What’s this 421 worth?
Views:
761
Posted By
b-man
Absolutely not 421 pistons. The valve reliefs are...
Absolutely not 421 pistons. The valve reliefs are completely different on a 421.
The valve reliefs and dish shown are what forged 428 replacement TRW/Sealed Power 12cc pistons all look like.
...
Forum:
Pontiac - Street
05-03-2024, 11:53 AM
Replies:
19
What’s this 421 worth?
Views:
761
Posted By
b-man
Standard bore size is 4.09375” for the 421. ...
Standard bore size is 4.09375” for the 421.
4.120” is standard bore for the 428.
4.160” is +.040” for the 428 pistons so you’re poking that 421 .06625” over which seems excessive unless the...
Forum:
Pontiac - Street
05-03-2024, 10:58 AM
Replies:
19
What’s this 421 worth?
Views:
761
Posted By
John Milner
The pin height will be the same. You would just...
The pin height will be the same. You would just have to be careful about running much lift if you used the 76 heads as the valve angles do not match up with the valve reliefs in the 428 pistons. I...
Forum:
Pontiac - Street
04-29-2024, 08:55 PM
Replies:
18
421 Block - Sevice Replacement?
Views:
849
Posted By
tom s
I think the correct term was "fitted block"no...
I think the correct term was "fitted block"no crank or rods.Tom
Forum:
Pontiac - Street
04-22-2024, 08:04 PM
Replies:
20
.005 or .010 shorter cam chain needed?
Views:
1,116
Posted By
65 Lamnas
I don't think it's a "shorter chain" when you're...
I don't think it's a "shorter chain" when you're buying that type of timing set. At least that's how it is with Rollmaster. With those .005 and .010 sets, the chain is the same as in the standard...
Forum:
Pontiac - Street
04-13-2024, 03:52 PM
Replies:
98
8.2 upgrade options
Views:
5,163
Posted By
Verdoro 68
The 33 spine TrueTrac is $35 more than a 30...
The 33 spine TrueTrac is $35 more than a 30 spline ($510 vs $475).
I put my order in online and a rep from Moser called me about 30 minutes later to run through the config and answer any...
Forum:
Pontiac - Street
04-07-2024, 08:03 PM
Replies:
24
exhaust manifold paint
Views:
1,039
Posted By
Verdoro 68
I've been really happy with the Eastwood manifold...
I've been really happy with the Eastwood manifold coating in spray cans. It lasted longer than the powder coating I had done and is easy to touch up if you need to.
Forum:
Pontiac - Street
04-07-2024, 07:22 AM
Replies:
6
Dakota Digital
Views:
417
Posted By
64speed
Dakota Digital
I think I posted a while back about my gas gauge quitting working and assuming it was the sending unit (Tanks Inc. Floatless Unit). Well ever since I have had these Dakota Digital RTX gauges there...
Forum:
Pontiac - Street
04-06-2024, 08:04 AM
Replies:
22
Best Radiator for a Street/Strip 75 Formula 400 Firebird.
Views:
1,172
Posted By
steve25
Other details for good cooling that often get...
Other details for good cooling that often get overlooked are hose related .
No flexible ribbed type hoses should be used since they create turbulence and that turbulence causes a restriction.
...
Forum:
Pontiac - Street
04-06-2024, 02:24 AM
Replies:
22
Best Radiator for a Street/Strip 75 Formula 400 Firebird.
Views:
1,172
Posted By
b-man
Here you go: ...
Here you go:
https://www.coldcaseradiators.com/node/164?sku=GPF18A
They sell oversize 2-row which cool better than 3 or 4 row radiators. I recently bought one of their heavy duty 2-row (1-1/4”...
Forum:
Pontiac - Street
04-01-2024, 11:24 AM
Replies:
15
Best way to start a motor after winter storage
Views:
851
Posted By
steve25
First off you want to pull all the plugs out. ...
First off you want to pull all the plugs out.
2) kill the power to the Dizzy .
You bo not want any spark to be produced.
3) crank it over for 10 seconds.
4 dribble fuel into the fuel bowl...
Forum:
Pontiac - Street
03-29-2024, 02:01 PM
Replies:
81
Breaking in your new engine and Break In Oil
Views:
5,400
Posted By
Formulajones
Oil analysis tells me that the good oil I use...
Oil analysis tells me that the good oil I use along with a decent store bought filter is still doing ok at 6000 miles and that's good enough for me. That saves me plenty of oil changes with the...
Forum:
Pontiac - Street
03-28-2024, 10:02 AM
Replies:
10
Pinion depth tool
Views:
681
Posted By
Keith Seymore
I made my own. I had a piece of aluminum...
I made my own.
I had a piece of aluminum flat stock laying around and chopped it down to fit. I shoot through the hole with a depth gage or my vernier and subtract the thickness of the plate...
Forum:
68-69 GTO Tempest & LeMans TECH
03-27-2024, 02:23 PM
Replies:
13
Chicken wire
Views:
936
Posted By
OG68
Chicken wire was used in the 68/69 Pontiac A...
Chicken wire was used in the 68/69 Pontiac A bodies.
However, the plastic inserts are shown in the 69 assembly manual in addition to the screen.
I don't ever recall seeing a 69 with the...
Forum:
Pontiac - Street
03-25-2024, 10:13 PM
Replies:
67
Diagnosing Loss in Performance and WOT Backfires
Views:
3,024
Posted By
JLMounce
Yes, I've verified all injectors are functioning....
Yes, I've verified all injectors are functioning. No injector fault codes either.
Showing results 1 to 25 of 500
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