For them mods, I would expect at least 220bhp, maybe 230bhp.
Get the codes read - There might be a fault stored that indicates where to start.
Also get a compression test done.
Mines done 140,000miles, and when I do my M50 manifold conversion and remap, I expect an absolute minimum of 220bhp. My compression test showed all cylinders at ~205psi, so with that in mind, I expect good results.