IMO mate, unless you break up into bits (then you will no doubt be left with lots) you will be far better off completing the car and getting it mapped as you say it's not going to take much to do this?
As much as i like frs's, there is a very niche market for a highly modified and different one like yours when for the same money you could buy a mint fully working 300 odd bhp one (i do realise what you must have spent on the engine etc by the way so not a dig), when complete and people see the power figures etc you might get the sort of money you're after