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Old 12-08-2011, 06:21 PM
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C4 front suspension for '55 3100

Regarding a '55 pickup. Am looking for a C4 complete front suspension.
Appears they are all hiding on the east coast. Nothing much in southern
California. Anyone out west with the suspension, just holler.
Is it true the '84-'86 C4 front suspension is a little narrower than the '87 to '96 thus maker a better fit inside the '55 frame? Is it better to get the
after market center frame support from an engineering company for $795 which includes some other brackets or just weld the C4 up on the existing '55
frame and modify the frame to accomodate the the C4 suspension???
What would be the forums recommendation for a rear end? We were going C4
for the rear but the frame shop suggested straight axle and not independent
as I would, but rarely, have some weight in the bed. The engine will be a good ole 350 Chev, Isky solid lifter cam (Z20) with 1.6 rockers. Should push
close to 400# of torque, with 9.5-1 running thru a 700R4 and ending up
with 3.73's in the rear. (With the 700R4, that drops down to a final gear of 2.61 idling down the freeways in OD)
Thank you in advance for any thoughts and suggestions.
Best regards,
Stevechevy Steve

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Old 12-14-2011, 09:26 AM
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Quote:
Originally Posted by stevechevy
Regarding a '55 pickup. Am looking for a C4 complete front suspension.
Appears they are all hiding on the east coast. Nothing much in southern
California. Anyone out west with the suspension, just holler.
Is it true the '84-'86 C4 front suspension is a little narrower than the '87 to '96 thus maker a better fit inside the '55 frame? Is it better to get the
after market center frame support from an engineering company for $795 which includes some other brackets or just weld the C4 up on the existing '55
frame and modify the frame to accomodate the the C4 suspension???
What would be the forums recommendation for a rear end? We were going C4
for the rear but the frame shop suggested straight axle and not independent
as I would, but rarely, have some weight in the bed. The engine will be a good ole 350 Chev, Isky solid lifter cam (Z20) with 1.6 rockers. Should push
close to 400# of torque, with 9.5-1 running thru a 700R4 and ending up
with 3.73's in the rear. (With the 700R4, that drops down to a final gear of 2.61 idling down the freeways in OD)
Thank you in advance for any thoughts and suggestions.
Best regards,
Stevechevy Steve

I bought an early C4 from Redline Corvette Parts in Upland a few years back. I don't know if he is still in business but his # is 909-946-5928.

The early C4 is slightly narrower than the later model. I don't remember the exact difference but it wasn't much. Either track width would be fine in a '55. I used it on a early Nova with a wheel with 6.5" backspace. I don't see how you could use the stock crossmember on a '55. I made custom rails on my car and laid them just inside the stock towers. The pickup rails would be too wide for that type of mounting.

Here are some pics of what I did. http://www.stevesnovasite.com/forums...11&postcount=5

I decided against the IRS on my car simply because of packaging in such a small car. I didn't want to remake the batwing, link bars and half shafts. I wouldn't hesitate to do it on the back of a truck. I would just run coilovers instead of the leafs, or maybe in your case some shockwaves.

FYI: The late C4 has more options for aftermarket brakes. Kore3 does make an adapter to run C5 brakes on either one though.
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Old 12-14-2011, 10:18 AM
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C4 front suspension

Slow4dr,
Thank you for the reply.
In regards to your C4 suspension, you did a great job on the piece you
fabricated to connect the front rails of the frame.
So many are telling me the Mustang II set up from Heidt is good for the truck.
Did you compare them to the C4? Although it's ALWAYS better to have
Corvette parts than ford for your ride?
How is the ride with the C4 suspension as opposed to your stock
suspension?
Thank you again for the reply.
Best regards, Steve stevechevy
(310) 547-0234
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Old 12-15-2011, 09:19 AM
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You might look at Progressive even though they're in Ohio. Scroll down about 2/3 of the page...

Russ
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Old 12-15-2011, 11:35 AM
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rear suspension for 55 Chev 3100...ideas?????????

Russ,
Thank you for the reply and progressive referral.
Any suggestions from you or anyone regarding a good rearend for the 55?
Being it will have a 700R4 with that GREAT 3.06 first gear, I can use anything
from 3.55 to 4.11s. Power is a ZZ4 ending up approaching 400 HP and 425# torque.
I was going to go with the Dana 44, Vet style, but being I will also use the truck
for trips to Lowe's to haul God only knows what, I will probably look for a straight
axle UNLESS...someone has a good recommendation.
Thank you again. Best regards,
Steve stevechevy

Last edited by stevechevy; 12-15-2011 at 11:44 AM.
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Old 12-16-2011, 09:02 AM
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If you have access to the Dana 44 setup, it could used for hauling by careful selection of coil-overs to replace the factory leaf setup. Those are pretty $$$ though compared to the weaker and more common Dana 36. You could search for Viper rear setup, they also used the Dana 44. I'd prolly go for the Ford 9", cheaper to buy and set up (plus more reliable) but not quite the "wow" factor if that's important...

Russ
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Old 12-16-2011, 08:54 PM
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56 GMC might be married to a stock Spicer 45???

Russ,
Did a little more research on the Jimmie. A post stated the 56 GMC 1/2 ton
might have a Spicer 45 which is very close in all areas to the Dana 44. I just
might have one hell of a rear end now...Rather good news. I rather doubt it
would be posi but will pull it out and verify gear ratio as I will be taking the
body off over the next couple of weeks. Probably a 3.90 rearend but that
would work GREAT with the 3.06 first gear of the 700R4. I definitely shouldn't
be second thru the intersection too many times.
Thank you for your imput.
Best regards, Steve
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Old 12-22-2011, 01:31 PM
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Quote:
Originally Posted by stevechevy
Slow4dr,
Thank you for the reply.
In regards to your C4 suspension, you did a great job on the piece you
fabricated to connect the front rails of the frame.
So many are telling me the Mustang II set up from Heidt is good for the truck.
Did you compare them to the C4? Although it's ALWAYS better to have
Corvette parts than ford for your ride?
How is the ride with the C4 suspension as opposed to your stock
suspension?
Thank you again for the reply.
Best regards, Steve stevechevy
(310) 547-0234

I never finished the car so I can't comment on the performance. I have since been employed within the industry so I wouldn't do what I had dnoe again. I have learned a bunch since then so it just seems silly to me now to ever do something like that again. There was a ton of reinvention of the wheel that could have been simplified by a "kit".

I wouldn't hesitate running a MII front end on your truck. Just do your homework. Every MII kit is not created equally. Look for extra thick control arms, heavy duty ball joints, one piece lower arm shafts, stronger crossmembers etc etc to handle the weight of the truck.

I see the 310 area code so you are somewhat local to me. I'll give you a shout in a little bit.

-J
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Old 12-22-2011, 01:45 PM
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I just let a dana 44 87 vette rear end go for $1000, needed the money or I would be holding on to it for my project. Hope your rear is right for you, if not, you may want to look into a 14 bolt from a 88-98 2500. Have any pics of the ride?
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Old 12-22-2011, 07:44 PM
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Mustang II front suspension-56 GMC

The '56 GMC we just got has the complete suspension from Brothers and it's
in boxes....The only thing done was the front cross member support connecting the front frame rails was nicely welded in place.
Will advise you regarding the project.
Best regards, Stevechevy (now GMC)
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