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Old 01-28-2004, 08:06 PM
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Exclamation Suspension Mods for a 67' mustang, help!?

I'm currently restoring a 67' mustang fastback and am close to FINALLY finishing the bodywork. The next item on my list is the suspension. I'm wondering how I choose my springs? The car will get a stroked 351w and a tremec 3550 transmission. I would like the car to ride about an inch lower than stock height and will probably relocate the A arms for better steering response. If anybody knows how I can figure out what size, rating, etc. type of spring I could use, I'd sure appreciate it. The grab-a-trak package that Mustang Plus sells sounds tempting, but will the 620lb. coils be enough for the 351w? Also, when I relocate the A-arms, what will that do to the ride height and the ride of the car? If anybody can direct me to a helpful link or write a book to explain this, I'd really appreciate it.

Thanks in advance,
Pencilneck314

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Old 01-28-2004, 08:31 PM
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IN THE NEXT COUPLE OF WEEKS I'M GOING TO BUILD A FRONT END FOR A 67 MUSTANG I WAS SUPPOSED TO DO A 54 CHEVY AND POST THE PICS BUT THE GUY HAD SOME STUFF COME UP. I'M GOING TO USE A HEIDTS MMII ON THE 67. CROSSMEMBER WITH CONTROL ARMS THAT I'M BUILDING AND 78 CHEVY SPINDLES. I'M GOING TO POST THE PICS BECAUSE I USE THE SCREW IN BALLJOINTS IT COULD HELP YOU OUT. I'LL LET YOU KNOW WHEN I START.
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Old 01-28-2004, 08:38 PM
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Any and all info I get will help.

Thanks
Pencilneck314
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Old 01-29-2004, 10:36 AM
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visit here...

www.vintage-mustang.com
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Old 01-29-2004, 02:48 PM
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good deal...

Thanks for the link. That pretty much answers all my questions

Thanks again,

Pencilneck314
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Old 02-01-2004, 03:55 AM
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i bought my parts from www.mustangsplus.com for my 65 i can only recomend it...
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Old 02-01-2004, 07:50 PM
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How long....

How long have you had them installed?
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Old 02-02-2004, 11:05 AM
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going on 4 years now. i bought their street kit with some upgrades. 620 coils, reverse eye 4 leaf springs, racing shackles, full polyurethane front bushings (including strut rod) and kyb gas adjust shocks. the sway bars are 1-1/8 and 3/4. and ivce made a camber kit myself, i lowered the upper controll arms 1.5 inches and made the wedges myself. i nstaalled a quick steer kit (but wide soft tires, lowered controll arms and quick steer doesnt make for an easy paralell park!!) But the ride went from old mustang (like riding in a baby wagon on a pot road) to somthing that will corner better than both my moms honda and my stepfathers 96 BMW convertible (i am really thinking about building a rack and pinion setup but with the roadster i dont seem to find the time)

The shelby lowering is however the first and best mod youll ever find and its free :-)
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Old 02-02-2004, 07:56 PM
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In the works...

Yep, I've already got the template for that, and that's what I've heard, "The Shelby lowering improves the handling the best". I didn't however, realize that you needed to adjust the camber when you made that change. You said you made the camber plates yourself? You know of a site that may have a template for the wedges for a 67' fastback, would you? I don't plan on adjusting the a-arms as low as you did though. I'm think I'm going the standard 1" drop and the mid-eye leafs in the back. I attached a file with the cars present condition. Before you mention it, I'll be pressure washing, blasting and scraping all the old undercoating off and applying new undercoating to the entire area. Oh, and I've got the spindles and rotors from a 78' granada for that conversion also. It looks to be a long road ahead.

Thanks for the info,
Pencilneck314
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Old 02-03-2004, 12:37 PM
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with modern ball joints and a 1 inch drop i really don't think the wedges are going to be an issue. with regards to the templates i milled a piece of aluminum 5 deg angled and milled it for clearance so the ball joint could fit through. and marked up the holes and drilled them so they fit the ball joint and controllarm. but i don't think you'll need them at all.

with regards to adjusting the camber, thats what the relocating does. it adds negative camber as the suspension moves upwards and thus fixes a ford geometry problem (it isn't really a problem but the front suspension is engineered to add positive camber to make the car under-steer ar the body rolls in corners, because the under-steer made for the "secretary car" handling they wanted) so we performance minded drivers who hant more corner grip and possibly a slight over-steer must correct this engineering disposition, like ol Carroll Shelby did in the 60'ies
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Old 02-03-2004, 07:07 PM
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Well, GOOOLLLLYYYY....

You keep all that info in one head or is there another attached to your left shoulder. Good deal, and thanks for the excellent responses.

Thanks again,

Pencilneck314
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Old 06-23-2004, 04:53 PM
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Anyone every heard of a modification shelby made to the steering of the early mustangs, i heard mention of perhaps different idler arm and pitman arm, can anyone educate me? Thank you much.
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Old 06-24-2004, 10:04 PM
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I think what you have in mind is a "quick steer kit", consisting of a shorter pitman arm and idler arm. Seems to me I saw them available from Branda.com though I may be mistaken. Have a look.
Lowering the upper a arms per the widely available diagram is called the "Shelby drop". Most folks report no problems after doing it. You can however drop them even further to obtain the best camber curve possible. This however will force the balljoint to it's maximum travel if you hit a hard bump. This can, and likely will, break the balljoint. Thus if you wish to do this you'll need to alter the balljoint's angle to permit it's normal full travel. This is usually accomplished buy buying a "negative wedge kit". Or you can make your own if you have the tools. Another method is to cut and re-weld the end of the upper a-frame. Either way works, but the best way is to just replace the upper arm with one that has all this designed into it, such as those offered by Global West.
For the money versus performance value, you can't beat just going with the standard drop. Most folks believe the extra 1/4" or so is only really beneficial on the racetrack and not worth all the work/money for any other use.
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Old 06-25-2004, 05:31 AM
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i went overboard and lowered mine 1.5 inches... i did this because a friend (former freind..) races mustangs on open course and he has relocated his 2 inches downwards, and boy does it ever corner.. (which is also why i had the aluminium wedges made) the quick steeer kit consists of a longer pitman and idler arm, and well it quickens the steering
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