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01-27-2026, 03:36 PM
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Senior Member
 
Join Date: Jul 2000
Location: North Texas
Posts: 4,035
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Old Air firewall cover plate problem
Regarding the firewall cover plate, the instructions say to enlarge the firewall holes to 5/16 and then mount the panel via bolts and its pressed-in studs. However, the holes and studs don't line up with my firewall holes.
I sent a photo of my cover plate to Old Air, and they said it's the correct one for heater-only cab, which is what I have. So I don't know what's going on. If you have an Old Air system installed on a heater-only cab, please send me photos of your installed cover plate, where the bolt heads are clearly visible. And let me know if you had similar problems. BTW, the cover plate that came with my 1998 Vintage Air system has the holes in the proper place.
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Mike 1969 Custom/10 LWB -- owned for 37 years. 350/TH350, 3.08 posi, recent AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. Hedman stainless headers. Old Air installation in progress. 1982 Custom Deluxe 10 SWB -- converted from 250-six to roller cam 350 w/ Vortec heads -- sold 1981 C10 Silverado LWB, 305, TH350C -- sold, but wish I still had it! 1969 C10 (not the current one) which I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 26 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! |
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