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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Sep 2003 Posts: 2,384 Shop Shark | | Shop Shark Joined: Sep 2003 Posts: 2,384 | Been driving my 64 alot as it now has exhaust, just wondering if 65-70 was OK for the old dog on the freeway, should be around 3000 rpm. 230 with 3.73 gears. Yes, I'm keeping an eye out for an overdrive. Brian | | | | | Joined: Jun 2000 Posts: 2,773 'Bolter | | 'Bolter Joined: Jun 2000 Posts: 2,773 | You should be okay. I ran a pickup with the same gears and a 250 for 120K miles with no engine problems. Usually ran 70+ on the highways.
Fred
52 3600
69 C-10
| | | | | Joined: Jan 2001 Posts: 687 Shop Shark | | Shop Shark Joined: Jan 2001 Posts: 687 | My 66 was set up the exact same way. Hurt like crazy to drive it on the freeways!  A steady 65 mph made the little 230 sing like a strained mockingbird. Trying to keep up with the "slow" traffic on the interstate at 70 mph was close to engine homicide. A 292 engine and new process overdrive tranny swap later and now 80 mph is fewer rpms that 60 mph was before overdrive.  Now 70 mph is very comfortable at only 2200 rpms, with at least 10-15 mph of extra cruising speed comfortably available. Overdrive is WELL worth the effort. -ftyler | | | | | Joined: Sep 2003 Posts: 2,384 Shop Shark | | Shop Shark Joined: Sep 2003 Posts: 2,384 | I only travel about 15 miles each way on the freeway. It seems OK with 65, not screaming or anything, will really jump to 70, merges really well. Maybe this is just the first six I've had that wasn't beat, but this one is really spunky, I'm pretty surprised with it. Mileage hasn't been too too bad, 12.5 mpg w/1st tank, 16.4 mpg from second. Brian | | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | Those engines are pretty tough. If its in good shape you won,t hurt it. Big diameter tires help too. 
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | |
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