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  • · Registered
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    660 Posts
    I think the truck frame is easier to work with because Blazer/Jimmy frame rails are different on the two sides of the vehicle and may be more limiting to rear travel. Think about where you want your fuel tank or cell also (different in truck vs. suv).

    7" used to be decent, but is less than the newer cars (Subies around 10"). Goes back to if your are building a budget rig for fun or trying to be competitive.

    I agree on not changing wheelbase if you are building a reg cab short box, not worth the hassle.

    Keep in mind big guys often don't fit in reg cab mini trucks once the cages are added.

    Be sure to clear you plans with scruitineers before spending any time or money. Rules change all the time and they are the one most on top of things.

    This SS message thing is wierd, I don't get notices of new messages. Use jeklcox@gmail.com to reach me sooner.

    · Registered
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    563 Posts
    i am not planning on changing the wb
    i am planning on adding some c notches i have been looking into some longer a arms and axles up front
    but 7" is not bad compared to a strut cars
    do you think there is any advantage in useing a 4door jimmy frame over the truck frame?
    thank you

    edward

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    660 Posts
    I did shorten the wheelbase to about 100". This was considered the "idea rally wheelbase" at the time. I think it's a bit too short for the faster rallys we have today. It's way too short for a 2WD.

    I built a 4-link rear using the factory front leaf spring mounts and fabricating upper y-links mounted to the top of the diff. This is a very cheap/backyard way to do it. Not close to ideal (short arms, mounts welded to cast diff housing, etc). Travel is very limited if you don't notch the frame. I haven't done anything more with the rear because the big limitation is the front travel, whcih is limited to about 7" due to the short a-arms and CV shaft angle tolerance.

    Jim

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    563 Posts
    just looking at how you did your rear suspension and did you shorten the wheel base? and some motivation

    edward
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