Can older non dedicated boards be used for foiling

[ittiandro]

I am envisaging toi buy a wing ( Duotone or other). For the moment I’d use it on a Bic Sup, without a foil, to have fun in light winds, as an alternative to paddling. Among other things, the advantage is that I don’t have to go through the hassle of rigging and tuning the sail.. A wing is ready to go ! Eventually, though, I will buy a foil.
For the moment I’d like to know
1 Can a foil be safely used on any older non-dedicated board with,opf course, a Deep Tuttle finbox?
Due to the wing and foil craze, the prices of dedicated foil boards soar to the stars, as sellers no doubt take advantage of this new hype to jack up their prices…I have seen packages over $ 3000 !
2. What board is recommended for maximum stability when using a wing ?( No foil)
In terms of volume, my comfort zone is no less than 130 lt.( I weigh 85 kg).
Regarding the width I have been doing some balance training on my SUP, trying to get on an off like I would do with a wing.. The width is about 85 cm, which is fine, except that it tapers considerably in the back, which makes it still wobbly without a mast and wishbone to hold on.
I have seen people using real wide boards, which don’t taper off as much in the rear. They seem to have practically the same width all along, which should make them very stable…
Any suggestions?

Thanks

Ittiandro