Pontiac - Street No question too basic here!

          
 
 
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Old 11-16-2025, 09:08 AM
Half-Inch Stud's Avatar
Half-Inch Stud Half-Inch Stud is offline
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Join Date: Jul 2000
Location: BlueBell, PA or AL U.S.A.
Posts: 18,890
Cool Hardblock & Glyptal

What are the prevailing ohpinions for Hardblock on the Street?, and Glyptal on the Block interior?

I did Hardblock on a 455 to the freezeplug & Water Pump holes lower edges: seemed fine except for sitting in traffic.

I had a spare 455 with glyptal valley and it looked high fidelity after a decade or so.

My Application: Iron head 421 for Lonngk Highway Cruise and Towing.

__________________
95 Towncar that needs more TQ.
Sold 2023: 12.24/111.6MPH/1.76 60'/28"/3.54:1/SP-TH400/469 R96A/236-244-112LC/1050&TorkerI//3850Lbs//15MPG/89oct
Sold 2003: 12.00/112MPH/1.61 60'/26"x3.31:1/10"/469 #48/245-255-110LSA/Q-Jet-Torker/3650Lbs//18MPG 94oct
Sold 1994: 11.00/123MPH/1.50 60'/29.5"x4.10:1/10"/469 #48/245-255-110LSA/Dual600s-Wenzler/3250Lbs//94oct

Last edited by Half-Inch Stud; 11-16-2025 at 09:22 AM.
 


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