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Old 02-06-2009, 02:05 AM   #77
mosesburb
I had a V-8
 
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Join Date: May 2003
Location: Phoenix AZ
Posts: 1,116
Re: The Story Of A Suburban (Lots Of Pics)

Quote:
Originally Posted by justcuz View Post
Are you going to keep those front springs?
For the foreseeable future, the front springs will remain. I have spent (and need to spend) so much money on this project that, at this point, I can not justify replacing new parts with new parts.

Quote:
Originally Posted by justcuz View Post
Have you seen the conversion were they use Chevy 1/2 ton 52 inch back springs on the front? They move the front mount forward about 2 inches. This would give you a little more clearence for the Dana 60 and allow more spring flex than your lift springs would allow. It should save the chassis.
I had done some investigation on this several years ago and in talking with some people who had done the conversion, decided it was not for me. The biggest issue with it is the flex. The rear springs have a lower rate than the front springs and are narrower in width. The guys I spoke with that are running them said body roll increased dramatically. This was not an issue for them, but I do not want a weaker spring that is too flexible under this much weight. If I decide to go with something different, I will probably have some custom springs made in the '73+ length, with a spring rate that will work well for this mess I am building. I wish I could have done it earlier in the project, but I had no way to calculate the weight on the front axle to be accurate enough to get the spring rate right the first time.


Quote:
Originally Posted by justcuz View Post
How much lighter is the 4 cylinder Cummins? I have heard they weigh about 800 lbs, which is not too much heavier than a complete big block, correct?
I'd say that 800# would be fully dressed with accessories and flywheel. Yes, that is about the same as a dressed big block.


Quote:
Originally Posted by justcuz View Post
I enjoy reading this thread because you have been very creative in making things work. This is a credit to your skills and thought process as a mechanic and fabricator.
Thank you. I try to think things through before I start on a particular aspect of a project so that I do not have to go back and re-do something I just did. While this sounds good, it does not always work out as planned, but by reducing the amount of "re-do's" it helps keep morale up and forward progress happening.
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1972 K20 Suburban, 5.9L Cummins, Banks Power Pack, NV4500HD, NP205, H.A.D., D60/14FF ARB Link To Build: HERE.
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