You can place the jackstands under the axle tube in rear. The front, I place them at the crossmember..under engine. Avoid placing the stands at the control arms or otherwise any suspension point.
As far as tire inflation..I say take the tires off, coat them with protectant and store them inside. Maguires vinyl/rubber works great. Avoid the silicone based items. They look good for shows, but work like crap for the real purpose. The idea of taking the weight off the tires is to avoid flat spots in the tires over the storage period. If you opted to raise the car off ground, tires free from surface, no need to fill to 60 psi. On that note, I do not think it a very sane practice to keep a 30 psi max tire at 60 for 5 months..just my logical opinion.Sounds like trouble to me. Murphys law..
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1967 Starlight black PMD Engineering 400 Auto 1968 Alpine Blue 400 4 speed 1968 Verdoro Green 400 HO 4 speed 2013 1LE 2SS/RS Inferno Orange Camaro.