WorksWorks ok on Perez's car, think the Lb carries a bit more weight up front.
The two things are completely different entities.
Davids genuine car will have jacking points fitted into the sills as per this picture
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These are a square section tube which is most likely located slightly farther forward, closer to the balance point of the chassis which accepts a jack which has a square peg, the positive location of a square within a square will help prevent the jack twisting & the car rolling forward whilst it is lifted off of the ground. In this scenario you would lift one side of the car off the ground first to change the wheels on that side before swapping & lifting the second side independently. So no, you wouldn't lift both side of the car at the same time using these points
Sill stands are a totally different entity where the stands are located into round tubes & used as pairs which allows either end of the car to be lifted independently of the other using a trolley jack as the lifting device. In this case the rear of the car could be lifted first & then because the mounts are tubular thus allowing the car to rotate around them then the front of the car can then also be lifted to the same height. In this case the rear mounts are farther back than the balance point to prevent the car tipping backwards as suggested earlier. See this pic of the Perez car for reference.
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Last edited by Strat Fan; 12-05-2015 at 20:12.
"You can lead a horse to water, but a pencil must be lead"
Stan Laurel
A neat idea Craig..
Not a million miles in distance between the two pics to my eyes at least, from jacking point to the sill stands.
David
Thanks for the info on the jack as well
Looks like Perez has done his maths ! Those chassis stands have a wide base that takes the load back.
I guess back in the '70's they didn't have the facilities that they do now so they did it like this:
I was a bit worried that with the extra bodies on the rear end, it might tip up !
The photo is courtesy of Ron Pellat (whose wellies are sticking out the right). Ron was the chief mechanic at Chequered flag back in the day and is also doing some work on my Safari car.
Some things haven't changed.
There's a lady there with her arms folded supervising the fellas!!
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