What is the best way to measure a Ghia body for level?

[Evil_Fiz]

I need to suspend my Ghia body and have it level front to back and side to side. It will be suspended temporarily while I take measurements for my tilt rotisserie. I need the level measurements to be as accurate as possible due to the height differential between the front and rear mounting points. I have checked for level using the door sills and the bottom pinch welds on the rockers and both yield different measurements.

What is the most accurate way to measure and ensure the body is level front to back and side to side? I'm certain there is a "BEST" way to do this but it eludes me.

Cheers,
Emil
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“…It's not just about what's interesting. It's also about what's helpful, and it's helpful even if it helps just one other guy working on a Ghia.”
kiwighia68

See my build on TheSamba at:
The K_R_A_K_E_N_N : a 70 Ghia Convertible reinterpreted

[theKbStockpiler]

A suspension alignment specification should get you from front to back.
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Use all safety devices including a mask.

[Mike Fisher]

The body has flat heater channel bottoms under the doors & would be used for leveling in both directions.
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https://imgur.com/user/FisherSquareback/posts
69 FI/AT square Daily Driver
66 sunroof,67,70,71,71,71AT,72,72AT,73 Parts
two 57 oval ragtops sold
'68 Karmann Ghia sold

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[Evil_Fiz]

[theKbStockpiler]

[Evil_Fiz]

UPDATE:
My garage floor was too uneven to yield accurate measurements. I ended up using a string, level, and wooded blocks to set reference points on the garage floor. I suspended the car from the ceiling using forged eye bolts and two come-alongs, leveled it, then used the floor reference points to measure to the bottom horizontal surface of the heater channel at the front and rear. This got me close enough for what I needed.

Thanks for the feedback.
Emil
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“…It's not just about what's interesting. It's also about what's helpful, and it's helpful even if it helps just one other guy working on a Ghia.”
kiwighia68

See my build on TheSamba at:
The K_R_A_K_E_N_N : a 70 Ghia Convertible reinterpreted

[Mellow Yellow 74]

I used a long spirt level along and across between the heater channels, then packed my body dolly up using pieces of timber then pieces of sheet metal as required to get the level right. A laser level would be more accurate but hopefully the spirit level was close to within a couple of mm.

You can move the body without realising it as you work on the car so my advice is to reckeck the levels when you trial fit before doing any major cutting and welding.
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1962 Karmann Ghia
1974 Deluxe Microbus
1985 Caravelle (Vanagon)

[Evil_Fiz]

[calvinater]

Got any pics?
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"Albatross"!

[Evil_Fiz]