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David
yes you have a floor mounted bar, but you forget that we added (by welding) vertical supports from the bar to the adjacent inner part of the rocker panel. So any flexing from the floor mount is negated by what we had welded to the stronger part of the chassis.
You can add some more rigidity by having us add a B pillar connection between the shoulder harness mount and the bar. Then it would essentially have the same strength as a roll cage from the hoop side.
The rear extensions go to the wheel wells on your car (Autopower) which is actually acceptable to SCCA as part of their cage requirements. You do have a little bit of flex from these wheel well attachments, but not as much as you would think
As your car is getting more modifications, you may want to consider adding bars from the main hoop to the rear shock bridge; although this is somewhat radical with cutting thru the bulkhead to do so. Another mod would be to install a X brace on the rear section to the hoop. This is not going to be fun as access with carpeting and a welded in main hoop is difficult
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1970 914-6 street"evil cockaroach"
1970 911 Targa "ST"
Jade Green IROC Tribute (ready to race)
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