[PeteLeathersac]

Would wheel dollies under the front wheels hold the car up for spoiler clearance also roll Ok on your ramp and transitions plus could you leave them in place while strapped on the trailer?
Some dollies are available w/ larger wheels if necessary also if all clears you could perhaps modify each dolly w/ a small ramp to roll the car onto them instead of jacking it up?
As for the hook location, it may be worth fabbing a hook that fits inside the subframe crossmember bottom hole w/ angle and eye flat forward to hook the winch lead to?

[img]<<GRAEMLIN_URL>>/hmmm.gif[/img]
~ Pete