Dennis wrote:I would have to change something to make the forestay shorter by at least the length of the snapshackle.
On my SA boat I can remove the open body turnbuckle and the Sta-lok, reduce the wire and refit. I may need a new cone though.
http://www.jimmygreen.co.uk/products/yacht-ropes---rigging/wire-rigging/sta-lok-diy-terminals
No need to replace the whole forestay, just get the right bits to accommodate a snap shackle.