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Re: windshield rust
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Originally Posted by grizz
i have not seen any rust on the firewall yet . can you tell me were to look and why would the firewall rust out. thank you
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The old panel sealer becomes dry and cracks and allows moisture (electrolyte) to stand between the spot welded panels (anode & cathode) creating a path for electrical current to flow thus causing galvanic corrosion. Same theory as a battery. Eventually the metal erodes away. 
Look for leaves pine needles and dirt under the vent cowl, these trucks tend to rust out in the fresh air vent area too.
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'72 GMC SWB C1500 Custom, frame-off in progress. 383 SBC, 9:1CR, Comp Cams XE262H, Scat internal balanced crank, Eagle SIR 6" rods, Keith Black dish pistons, Dart Iron Eagle 72/180 heads, Weiand Stealth intake, Stewart stage I water pump, Holley 4bbl vac sec, TH350 with B&M Shift Improver Kit. 12 bolt positraction.   
Last edited by Sweet72; 01-07-2006 at 08:38 PM.
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