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Old 08-18-2008, 10:47 PM   #1 (permalink)
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Anyone ever back half a mustang??

Thinking about back halfing my 70 coupe but not sure, just a thought. How is it done??? I read the chris alton article on his 65 and it looks sweet. My motor should make about 650-680hp on pump gas, and i wanna drive it around. I'm pretty sure that with some nitrous i will go fast enough to need a cage or roll bar at least and probably a ladder bar or 4-link setup. I am wondering if i should just do the whole works and be done with it. Anyone done it and have pictures???
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Old 08-18-2008, 10:48 PM   #2 (permalink)
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Re: Anyone ever back half a mustang??

Read this...

http://cachassisworks.com/Stories/HowCAC-003_WEB.pdf
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Old 08-18-2008, 10:58 PM   #3 (permalink)
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Re: Anyone ever back half a mustang??

i did i really like the way it looks just wondering if i should take the car that far or not, unsure yet. Also just curious how it all holds together with the tubs in there as they are apparently not attached to the quarter panels or anything. Its a street car yet, but it would sure look good with huge tires in it. Just wondering how feasable it is and if anyone else has done it. The car isn't really original anyway i've already replaced the front floor plans, torque boxes in the front, and non of the drivetrain is original, the rear quarters are made of tin and roofing tar to seal it all up. But still i almost feel bad cutting it up that much.
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Old 08-19-2008, 05:52 AM   #4 (permalink)
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Re: Anyone ever back half a mustang??

http://www.fordmuscleforums.comdra...-sec-slip.html

What other pics would you like? I could email a bunch. Actually, I am not toooo far from you?
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Old 08-19-2008, 06:15 AM   #5 (permalink)
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Re: Anyone ever back half a mustang??

Its a lot of work, You need to be very good at welding and fabrication.







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Last edited by dfree383; 08-19-2008 at 06:17 AM.
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Old 08-19-2008, 12:30 PM   #6 (permalink)
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Re: Anyone ever back half a mustang??

dfree i have a buddy who is magical with metal and a welder and he offered to cage it for me this winter so i was thinking is it worth just caging and leaving stock wheel wheels or just hack it out and be done with it. My dad hates the thought of me even modifying it he likes things "stock" and cringes at the fact i plan to put a minimum 650hp motor in it, and hit it with 200 worth of nitrous. Well it isn't gonna stick with the stock suspension so something needs to be done. I would like to see how you guys all finish off the wheels to the quarter panels more than anything and do you cut the whole wheel lip out or what??? What gives the quarter panels any kind of support?? Do you attatch the rear frame rails to the tail panel or something?? How do you keep it all sealed. It is a nice weather driver that i want to be really fast!!! I already had the motor on the dyno and made 615 so i'm well on my way. I want to do chassis work this winter. Thanks guys. And Jasson i'd love for you to e-mail me a bunch of pics. b_lokre@yahoo.com. THANKS!!!
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Old 08-19-2008, 12:37 PM   #7 (permalink)
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Re: Anyone ever back half a mustang??

Check out S&W they make a kinda Easy to install "KIT" with premade parts.

As far as sealing everything up typical guys just use Silicon caulking or body seal (Tape the edges first then seal and peal the tape off) and the panels are cut to just butt against the origional sheet metal.

Typicaly the cars body / Panels will support themself and yes you leave the lips on the 1/4's, but you may need to trim for clearance depending on the size of the factory openings or tires you want to run.

Rear frame rails usually use a front cross member going from rocker to rocker and rails going from them to the back rail of the body (typicaly below the tail lights)

Next time your at a track take a closer look at some cars.
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Old 08-19-2008, 05:05 PM   #8 (permalink)
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Re: Anyone ever back half a mustang??

I did a Maverick. Easy. Time consuming and an excellent learning experience. The hardest part was getting the 'nads to cut the car up. When you have it up on stands and you look at the trunk area, and see nothing below but shop floor (no frames or anything) you get an empty feeling...kind of like butterflies...and think to yourself "well, there's no turning back now".

In the end, it was WELL worth it! After I backhalfed mine, I have won more races with it in the last 4 years than I'd won in the previous 12 years. The first season I won 24 round straight. Once I got the chassis tuned, it was a LOT more consistent. Back then I was only running 6.60's in the 1/8. Now I'm down into the 5.70's and 80's. Same car-a little different suspension settings but same general suspension.
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Old 08-19-2008, 05:37 PM   #9 (permalink)
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Re: Anyone ever back half a mustang??

Mavman any pics??? I'd love to see, how do you finish off the interior by the quarter windows and stuff so it all looks smooth and finished???
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Old 08-19-2008, 06:50 PM   #10 (permalink)
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Re: Anyone ever back half a mustang??

I'm in kind of the same boat. I'm putting a 521 in a 68 mustang. I keep waflling to how much actual track time this thing will see. At this point in my life I think it will be more of a street car so I decided to try and use caltracs and monoleafs to start. If that doesn't work out or I start racing more then I'll backhalf it. It will always be easy to sell the caltracs and leaf springs to 'lesser' powered cars. Shouldn't be a problem to put a cage in now and then incorporate it into the 4 link later if you need to.
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Old 08-19-2008, 06:52 PM   #11 (permalink)
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Re: Anyone ever back half a mustang??

Did you read this how-to article? It's how to tub an early mustang, install the cage without affecting the interior too much, and finish it out. Good Stuff.

http://cachassisworks.com/Stories/HowCAC-003_WEB.pdf
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Old 08-19-2008, 09:09 PM   #12 (permalink)
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Re: Anyone ever back half a mustang??

Well after thinking about it some more my dad really doesn't want me to hack up my car and my buddy is nervous about doing mine because its so nice. So we are thinking that maybe i will buy a fox body and build one from that instead. Only time will tell.
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