Why not bin your idea of a 200 block, a decent 205 can run 500bhp no problem, and with the money saved get a after market ecu that can be mapped.
That fuelling may look bad, and very spikey but you don't know if PE used any smoothing software on the graphs, that would average the lines out.
A BD10 is not much of a step up from the std BD8, and probably not worth fitting imo.
It is impossible and pointless to go for what you call a "set up" to a tuner who can't alter the chip settings, it's worth a visit though just for a fuelling check.
The last stage 1 msd chip I saw on the rollers made 260bhp but only 220lbft, I suspected though this car had a fault and it was not down to the chip the lack of torque, my GGR stage 1 on the same rollers made 277bhp and 274lbft for comparison, but chip suppliers need to build in a safety factor, as enegines vary one to another, and they'd son get a slating if taking things too far and engines went bang!!!, and chips will NEVER give the same power/best running potential as mapped on the rollers, where everything can be taken to the extremes, and watched for safety.
Why not look into a after market ecu, that way, mapper dependant fuelling will be spot on as will all running be as spot on as it can be for the spec.
I've seen people "lose" power on my fave set of rollers yet when they take the car for a spin they mention how much better it runs and how much faster it is, with seemingly less power, but some are still annoyed at "losing" power over some one else's rollers, of course the extra never was there.
I know the difference it made to my car when mapped on the rollers, as I nearly crashed within 100 metres, as it suddenly had more power than I expected, the off boost power was amazing, I picked up 30bhp for around 8psi LESS boost, emissions were perfect as was fuelling.
What's the engine spec at the mo for this power ?
tabetha