bd14 inlet, std ex, is a nice combo, and does work quite well on the t34.63 with the correct software.

it will make more power than with the std cam, but you will lose a bit of torque on the way there, so it all comes down to what you want to do with it tbh, if its a track car then drivability isnt so much of an issue, and i would opt for the power in that instance

if running a bd14, it may be worth thinking about double springs for added safety,

and it also depends what software and map you intend to run, ie closed loop off the shelf can be more tricky to get right with a funky cam, although imo the exhaust cam would be more critical here

the mind boggles than people can advise on whats best for you, and yet nobody has asked what you actually want from the car or what you intend to do with it