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Search took 0.04 seconds. Search: Posts Made By: Mark66
Forum: 61-66 Big Pontiac TECH 06-20-2026, 12:13 PM
Replies: 2
Views: 909
Posted By Mark66
1966 GP power brake and MC upgrade

I own a 1966 Pontiac Grand Prix with a factory console 4 speed with 8 lug drums. The original power brake unit and original (single chamber) master brake cylinder are dying. I would like to upgrade...
Forum: 70-72 GTO Tempest & LeMans TECH 04-26-2026, 05:17 PM
Replies: 5
Views: 1,036
Posted By Mark66
Which bottom mounted pump tank did you use?

Which bottom mounted pump tank did you use?
Forum: 61-77 GTO, Tempest & LeMans Parts For SALE 04-26-2026, 03:58 PM
Replies: 0
Views: 60
Posted By Mark66
1967 GTO right exhaust manifold

9791637 GM4. One right (passenger) side exhaust manifold for a 1967 GTO 400 ci engine according to Wallace Racing. This is an original (not repo) exhaust manifold with fully intact (but stuck)...
Forum: Big Pontiacs (incl. G-body) WANTED 04-24-2026, 11:13 AM
Replies: 10
Views: 6,628
Posted By Mark66
Possible candidate????

Not exactly what you are looking for but I own a 1966 Pontiac Bonneville Brougham 4 door hardtop in excellent, unmolested condition. Rust free and beautiful Nightwatch Blue paint which looks...
Forum: Big Pontiacs(including G-body) FOR SALE 04-17-2026, 09:09 AM
Replies: 1
Views: 204
Posted By Mark66
sold

sold
Forum: Big Pontiac(incl G-body)Parts WANTED 04-14-2026, 09:24 PM
Replies: 3
Views: 1,157
Posted By Mark66
Carl S - I did indeed find one, but it took...

Carl S - I did indeed find one, but it took longer than expected. The challenge was to find one that the seller knew was working!! Thanks for checking.
Forum: Big Pontiacs(including G-body) FOR SALE 04-14-2026, 06:48 PM
Replies: 1
Views: 204
Posted By Mark66
1966 Pontiac b body power trunk components

Selling the following components for a 1966 Pontiac B body power trunk release system.

1) Vacuum reserve tank and bracket assembly
2) Lid lock vacuum release power unit assembly
3) Compartment...
Forum: 61-66 Big Pontiac TECH 03-08-2026, 03:38 PM
Replies: 4
Views: 289
Posted By Mark66
The fuel line seems to be the way to go but...

The fuel line seems to be the way to go but suspect that will not be the only problem I will have to solve to get the system working!!
Forum: 61-66 Big Pontiac TECH 03-05-2026, 11:24 PM
Replies: 4
Views: 289
Posted By Mark66
1966 electro-cruise vacuum line replacement

I have a factory electro-cruise system in my 1966 Pontiac Bonneville. The ¼ inch spring-reinforced vacuum line that connects the electro cruise power unit on the engine with the cruise release brake...
Forum: Big Pontiac(incl G-body)Parts WANTED 12-30-2025, 02:46 PM
Replies: 3
Views: 1,157
Posted By Mark66
WTB 1966 power vent window motor

Looking for a working driver side power vent window motor and regulator assembly for a big 1966 Pontiac with the short wire connector attached if possible. Group # 10.661, part number 4490687.
Forum: 61-66 Big Pontiac TECH 10-19-2025, 07:33 PM
Replies: 2
Views: 344
Posted By Mark66
1966 Big Pontiac headlight switcvh

Looking for a NOS/used headlight switch for a big 1966 Pontiac, PN 1995138. Also fits 1963 T/4 - T/8 and 1967 Catalina, Executive and Bonneville's and maybe others. Do not need knob and attached...
Forum: 61-66 Big Pontiac TECH 08-19-2025, 07:52 PM
Replies: 7
Views: 361
Posted By Mark66
Even with the headlight switch removed from the...

Even with the headlight switch removed from the dash, the wire loom is just not long enough to drop the headlight switch assembly down very far - which limits access to the switch and connector and...
Forum: 61-66 Big Pontiac TECH 08-18-2025, 08:31 PM
Replies: 7
Views: 361
Posted By Mark66
Carl S - looks like your advice provides the only...

Carl S - looks like your advice provides the only practical solution to separate the switch from the wire connecting block. But I am getting too old to do much under-dash work! God willing, I...
Forum: 61-66 Big Pontiac TECH 08-18-2025, 01:27 AM
Replies: 7
Views: 361
Posted By Mark66
1966 GP separating headlight switch from wire connector block

I am trying to replace the headlight switch on my 1966 Pontiac Grand Prix but having difficulty separating the wire connector block from the switch. The switch and connector block design – plus the...
Forum: Interior TECH 07-10-2025, 11:10 AM
Replies: 3
Views: 1,930
Posted By Mark66
Do the rear windows need to be in the fully down...

Do the rear windows need to be in the fully down position to remove the trim pad assemblies? After looking more closely at why trim pad assemblies are not releasing from the top of the inner door...
Forum: Interior TECH 07-02-2025, 05:08 PM
Replies: 3
Views: 1,930
Posted By Mark66
Goatracer1 - I will be using your suggested...

Goatracer1 - I will be using your suggested approach this weekend!! Thanks for the suggestion.
Forum: Interior TECH 06-30-2025, 10:04 PM
Replies: 3
Views: 1,930
Posted By Mark66
66 Bonneville hardtop door trim pad assembly removal

Hoping someone here can help me.
I own a 1966 Pontiac Bonneville 4 door hardtop. I am trying to remove the rear door trim pad assemblies to troubleshoot the power windows, but the top of each...
Forum: 61-66 Big Pontiac TECH 10-08-2024, 10:54 PM
Replies: 1
Views: 932
Posted By Mark66
Stuck gear shift indicator

The gear shift indicator on my column shift 1966 Bonneville (auto transmission) no longer moves when I shift out of park (P) - the indicator just remains at P. Is there an easy way to access the...
Forum: Members Helping Members 09-29-2024, 09:39 PM
Replies: 21
Views: 4,891
Posted By Mark66
Joerg: Sorry for the delay in reply to your...

Joerg:

Sorry for the delay in reply to your transducer question. A couple of points for you to consider:

1) The Cadillac picture of the transducer sold by CaddyDaddy looks identical to the...
Forum: Big Pontiac(incl G-body)Parts WANTED 04-27-2024, 10:40 PM
Replies: 0
Views: 831
Posted By Mark66
WTB - rear arm rest base 1966 Bonneville

I am looking for NOS rear door arm rest braces for a 1966 Bonneville, part numbers 4493348 RH and 44933449 LH. I would have mine re-chromed but can't find a place that would do it in under 7 to 8...
Forum: Big Pontiac (incl G-body)Parts For SALE 01-08-2024, 12:06 AM
Replies: 0
Views: 703
Posted By Mark66
Selling 1965 Grand Prix interior trim

Selling original white interior trim from a 1965 Pontiac Grand Prix. These trim parts have been stored inside for 30+ years. The white vinyl has some natural sun discoloring/yellowing and small...
Forum: 61-66 Big Pontiac TECH 12-28-2023, 07:18 PM
Replies: 4
Views: 1,682
Posted By Mark66
The largest bolt that will fit through the hook...

The largest bolt that will fit through the hook sleeves is one with a 5/16-inch thread, the same bolt size used for the V-8 valve covers. All of the other cylinder bolt holes take a large bolt that...
Forum: 61-66 Big Pontiac TECH 12-26-2023, 04:05 PM
Replies: 4
Views: 1,682
Posted By Mark66
Correct use of cylinder head lifting hooks

I have a pair of cylinder head lifting hooks, Kent Moore J-4266, but cannot figure out how to use them. The 1966 Pontiac Chassis Shop Manual shows the hooks (and a bolt of undetermined size to be...
Forum: SOLD Parts 12-11-2023, 07:53 PM
Replies: 4
Views: 1,862
Posted By Mark66
Biscayne and Doug - Sorry, they have been sold.

Biscayne and Doug - Sorry, they have been sold.
Forum: Big Pontiac(incl G-body)Parts WANTED 10-12-2023, 10:14 AM
Replies: 9
Views: 3,415
Posted By Mark66
I will take them this weekend and send them to...

I will take them this weekend and send them to you as a PM.
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