67-72 boxed frames pictures???? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**americanmusc1e** · 12-20-2009, 12:14 AM

Can I have some advice and pictures on how to box a 67-72 frame. I'm planning on swapping out my 383 smallblock for a modified (eventually) 12valve Cummins diesel. I love my 383, but I'm looking for more mileage (I drive this truck 5 days a week). with a modified cummins motor, an overdrive transmission and 3.08 gears I should be getting at least 20mpg and just as fast as the 383 was............not to mention the priceless look on people's faces when I tell 'em its got a Cummins motor.

shortbed70 · 12-20-2009, 07:58 PM

Well I would box the area directly in front of the motor and then a little ways behind the motor. Look at it this way. SEMI's have a c channel frame because if it were boxed the torque from the motor would tear the thing apart. Maybe from rad support mount to front cab mount.

12-20-2009, 12:14 AM	#1
americanmusc1e Senior Member Join Date: Jan 2009 Location: Austin, TX Posts: 1,079	67-72 boxed frames pictures???? Can I have some advice and pictures on how to box a 67-72 frame. I'm planning on swapping out my 383 smallblock for a modified (eventually) 12valve Cummins diesel. I love my 383, but I'm looking for more mileage (I drive this truck 5 days a week). with a modified cummins motor, an overdrive transmission and 3.08 gears I should be getting at least 20mpg and just as fast as the 383 was............not to mention the priceless look on people's faces when I tell 'em its got a Cummins motor. __________________ -- Josh Instagram: @americanmusc1e OLD SKOOL-- 1970 C10. 454/Th400/3.07 posi Build Thread FARM TRUCK----1949 Chevrolet 3800 Power Wagon Hauler Build Thread 1999 4wd OBS Tahoe - daily. DM me if you can't see photos i posted

12-20-2009, 07:58 PM	#2
shortbed70 Registered User Join Date: Mar 2002 Location: Forney TX Posts: 4,512	Re: 67-72 boxed frames pictures???? Well I would box the area directly in front of the motor and then a little ways behind the motor. Look at it this way. SEMI's have a c channel frame because if it were boxed the torque from the motor would tear the thing apart. Maybe from rad support mount to front cab mount. __________________ Troy 1965 Chevy Bagged,361 sbc,voodoo cam,1.5 full roller rockers,patriot 185cc vortec heads 2.02-1.60,vortec weiand polished intake,demon carb my truckhttp://67-72chevytrucks.com/vboard/s...d.php?t=332884 Big Red Dog build http://67-72chevytrucks.com/vboard/s...d.php?t=572274



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