Hi all,
I am now considering the top mounts for a four point harness. Champion book chassis.
1. What is the IVA requirement for the height of the eye bolts from the floor / seat?
2. What thread size do people advise for the eye bolts?
3. Where can I get some suitable threaded tube to weld between my double top tubes (I added a second, parallel to the book design, spaced with a 2" gap)

Advice and/or pictures much appreciated. Thanks

p.s. This is a great forum. thanks to all who have taken the time to answer my questions in the past.

[Edited on 13/3/10 by goodguydrew]

Thread is 7/16" edit unf

[Edited on 13/3/10 by big_wasa]

How ive done mine.

Taken from iva manual

Your picture is just how I plan to do mine. Where did yo get the threaded bar?
Do you have Any thoughs on a design for a headrest if one is not part of the seat?

3GE sell the inserts
http://www.3gecomponents.com/templates1/view_product.php?product=611&site=63&department=117

Usually 7/16 UNF though some harnesses are 8mm HT.

quote:

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Originally posted by BenB
Usually 7/16 UNF though some harnesses are 8mm HT.

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