Open all the doors to put on a lift?

[LancePearson]

I have a 76 l48 four speed and a 91 zr-1 and the 91 is infinitely more rigid than the 76. When you jack the 91 up with the floor jack just behind the front wheel at the correct jack point it lifts both front and rear equally. Driving the car it is so much more rigid than the 76 it's not even close. I now infinitely prefer driving the 91 largely because it is more powerful and so much more stable on a road, lower and bigger than the 255 tires on the 76. So far I still have kept the 76 but I drive it rarely now. I'll probably sell it in a year and if I do I might just go ahead and buy another Zr-1. I keep my tops off though the bronze colored one is in the back in its clips in case of rain so all my observations above are with it out, not in.

Lance P.

[scottfab]

Absolutely. All doors and hood and back hatch should be open. Otherwise the sky will fall.
I heard it on the "internet"

[efnfast]

Maybe the thought at the tire shop is, make sure the doors are open before you lift the car, because you won't be able to open them once in the air?

[GOLDCYLON]

Originally Posted by GTOger

Good call, Paul. And yeah, it was Discount Tire and a 4-point lift.

And hey, Secondchance... good share! Thanks, man!

My thoughts as well. GC

[ZR1North]

Originally Posted by GOLDCYLON

My thoughts as well. GC

Ditto for me, Secondchance. Appreciate it when people take the time to support arguments with this kind of useful detail - many thanks!

[Kevin]

Originally Posted by LancePearson

I have a 76 l48 four speed and a 91 zr-1 and the 91 is infinitely more rigid than the 76. When you jack the 91 up with the floor jack just behind the front wheel at the correct jack point it lifts both front and rear equally. Driving the car it is so much more rigid than the 76 it's not even close. I now infinitely prefer driving the 91 largely because it is more powerful and so much more stable on a road, lower and bigger than the 255 tires on the 76. So far I still have kept the 76 but I drive it rarely now. I'll probably sell it in a year and if I do I might just go ahead and buy another Zr-1. I keep my tops off though the bronze colored one is in the back in its clips in case of rain so all my observations above are with it out, not in.

Lance P.

while it maybe stiffer then your 76, it's not a stiff car at all unfortunately

[Gunny]

I have the "C" beam plates installed. In addition I installed the R&D Cross Bar which uses existing shoulder belt install points so no drilling required. I think the Cross Bar provides for harness install (I've not done that) plus a camera mount (I do use that) and maybe one other thing (can't remember) ... but the Cross Bar stiffened everything considerably so that, with the top off, I no longer experience the body flex as before. That was an unexpected "feature" that I'm really happy to have.

[Blue Flame Restorations]

It certainly doesn't HAVE to be done but the earlier models 63-82 cars do flex quite a bit when on a two post lift with adjustable positioning points. I would do it on these models. No reason not to. It wasn't a bad idea back in the day but not critical then either. Nothing was going to break or crack.

Since this was the case for so many years, I would only assume that the practice or belief has carried on to today.